---
product_id: 50613970
title: "Soft-Close Toilet Seat – Premium Urea Formaldehyde, Porcelain-Like Finish, Quick Release, Adjustable Top Fixing Hinges, Easy Clean, Standard Oval, Sleek White"
brand: "mass dynamic"
price: "¥19769"
currency: JPY
in_stock: true
reviews_count: 10
category: "Mass Dynamic"
url: https://www.desertcart.jp/products/50613970-soft-close-toilet-seat-premium-urea-formaldehyde-porcelain-like-finish
store_origin: JP
region: Japan
---

# Soft-close hinges for silent use Antibacterial urea formaldehyde material Adjustable top-fixing hinges fit most toilets Soft-Close Toilet Seat – Premium Urea Formaldehyde, Porcelain-Like Finish, Quick Release, Adjustable Top Fixing Hinges, Easy Clean, Standard Oval, Sleek White

**Brand:** mass dynamic
**Price:** ¥19769
**Availability:** ✅ In Stock

## Summary

> 🚽 Elevate your bathroom game with silent luxury and spotless style!

## Quick Answers

- **What is this?** Soft-Close Toilet Seat – Premium Urea Formaldehyde, Porcelain-Like Finish, Quick Release, Adjustable Top Fixing Hinges, Easy Clean, Standard Oval, Sleek White by mass dynamic
- **How much does it cost?** ¥19769 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/50613970-soft-close-toilet-seat-premium-urea-formaldehyde-porcelain-like-finish)

## Best For

- mass dynamic enthusiasts

## Why This Product

- Trusted mass dynamic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Whisper-Quiet Closure:** Soft-close lid prevents slamming and damage, perfect for peaceful homes.
- • **Effortless Installation:** Top-fixing system with included hardware makes setup quick and stable—no plumber needed.
- • **Hygiene Meets Durability:** Premium urea formaldehyde resists scratches, stains, and bacterial growth for lasting cleanliness.
- • **Universal Fit, Zero Hassle:** Adjustable hinges fit standard oval toilets (420–460mm), ensuring seamless compatibility.
- • **Sleek Porcelain-Like Finish:** High-gloss white surface adds a modern, polished look to your bathroom aesthetic.

## Overview

This premium Soft-Close Toilet Seat features durable, antibacterial urea formaldehyde construction with a porcelain-like high-gloss finish. Designed for universal oval toilets, it offers adjustable top-fixing hinges for easy installation and a secure fit. The soft-close mechanism ensures quiet, safe lid closure, while the quick-release hinges simplify cleaning, making it a hygienic and stylish upgrade for any modern bathroom.

## Description

Durable urea formaldehyde construction with smooth, high-gloss porcelain-like finish. Quick-release hinges, soft-close mechanism, and easy cleaning for secure, stable fit.

Review: Great Seat. Easy to fit - Review for OVAL SIGNATURE seat. I’ve had this toilet seat for two years now, and it still works perfectly. The soft-close mechanism hasn't skipped a beat or become loose, and the finish looks as clean as the day I bought it. I purchased another one this year (2026) for my other toilet. I’ve noticed a fair few reviews complaining that it’s difficult or frustrating to fit, but honestly, they must be doing it wrong. It took me less than 10 minutes total to get the old seat completely off and have this new one securely fitted. The instructions are clear, the fittings are straightforward, and everything lines up exactly as it should if you take a second to look at it. If you're on the fence because of people struggling with the installation, don't worry about it. It’s a quick job, a perfect fit, and built to last. Brilliant value for money. The black rubber like fitting you just force it through the holes on the toilet (it requires a bit of force and squeezing of the bung but it fits snugly) then you just literally screw the seat into the bung.. that's it Pros: • Built to last: Two years of daily use and the soft-close feature still works flawlessly. • Super quick installation: Took me less than 10 minutes to remove the old seat and fit this one. • Great finish: Easy to clean and keeps its premium look over time. • Solid fit: Doesn't slide around or loosen up like cheaper alternatives. • Made of a strong heavy plastic resin (Premium Urea Formaldehyde) Cons: • User error in reviews: Some buyers seem to struggle with installation, but as long as you follow the steps, it's incredibly simple.
Review: Top fixing is a dream... - Delighted with this loo seat. Fitting was easy, features are outstanding, completely non-slip. We have a 'modern' style bathroom suite which, to be honest, would be better off in a skip. The design is just perfect for not being able to get your arm around, under, over, through, whatever, to fasten anything. What should be the easiest of DIY jobs becomes a bone crunching nightmare. Last time we had a new seat (about 5 years ago) it took two of us just to hold the bolts and washers on so we could tighten it up, it really is almost impossible to reach the underneath of the bolts. Then we discovered these 'top fixing' loo seats and bolts. I was a bit sceptical but ordered one to take a chance. It's fantastic!! Extremely easy to fit, didn't need the instructions at all. The top fixing rubber bungs fit our pan superbly, nice and tight straight away, rock solid after the bolts were tightened. A great feature is the removable seat section so if the bolts become loose they can be tightened up in 60 seconds. The placement 'lugs' on the bottom of the seat (the bits that land on the pan rim) are made of a solid material that's completely non-slip on our pan. Even if the bolts came out completely I can't see this moving very far. Even with the bolts tight, there is some slight movement of the whole seat assembly, but this isn't because it's becoming loose, it's just the play where the removeable seat fixes into the mounting bolts. We love the soft close as well. Sooooo many times I've woken up in the night to pee, crept around the room, quietly gone into the loo then dropped the old seat with one hell of a crash. Not possible anymore. Bliss. I made just one change to the manufacturers intentions for fitting. There are two lengths of bolts provided, short for top fixing and long for bottom fixing. I used the long bolts but still used the top fixing method. I did this so that we could practice our contortion and bone breaking yoga skills to try to get the bottom bolts on as well if necessary. I genuinely don't think we'll need to do this.

## Features

- Soft-Close Lid & No Slamming – Premium toilet seat with soft-close hinges ensures quiet, safe closure, preventing slamming and damage for family-friendly use.
- Adjustable Fit & Universal Compatibility – Fits most standard toilets with mounting holes 14–19mm and adjustable width 95–185mm, compatible with oval toilets 420–460mm long.
- Durable Antibacterial Material – Made from hard, non-toxic urea formaldehyde that resists color change, scratches, and bacterial growth for long-lasting, hygienic use.
- Easy Installation with Top-Fixing System – Complete hardware included; top-fixing design simplifies installation, keeps seat stable with non-slip buffers for secure everyday use.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | 9993035300 |
| Best Sellers Rank | 7,190 in DIY & Tools ( See Top 100 in DIY & Tools ) 56 in Toilet Seats |
| Brand | MASS DYNAMIC |
| Colour | White Oval Signature |
| Country of Origin | China |
| Customer Reviews | 4.3 out of 5 stars 7,361 Reviews |
| Included Components |  |
| Item Dimensions L x W | 45L x 37W centimetres |
| Item Type Name | Toilet Seats |
| Item Weight | 2.4 Kilograms |
| Manufacturer | MASS DYNAMIC |
| Material | Urea-Formaldehyde |
| Model Number | Md-wc-001 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Operation Mode | Automatic |
| Part Number | MD-1610 |
| Product dimensions | 45L x 37W centimetres |
| Shape | Oval |
| Style | Oval Signature |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** MASS DYNAMIC
- **Colour:** White Oval Signature
- **Item weight:** 2.4 Kilograms
- **Material:** Urea-Formaldehyde
- **Number of Packs:** 1
- **Number of items:** 1
- **Product dimensions:** 45L x 37W centimetres
- **Shape:** Oval
- **Style:** Oval Signature
- **Unit count:** 1.0 count

## Images

![Soft-Close Toilet Seat – Premium Urea Formaldehyde, Porcelain-Like Finish, Quick Release, Adjustable Top Fixing Hinges, Easy Clean, Standard Oval, Sleek White - Image 1](https://m.media-amazon.com/images/I/41qiUn3EGiL.jpg)
![Soft-Close Toilet Seat – Premium Urea Formaldehyde, Porcelain-Like Finish, Quick Release, Adjustable Top Fixing Hinges, Easy Clean, Standard Oval, Sleek White - Image 2](https://m.media-amazon.com/images/I/61AncCBoBML.jpg)
![Soft-Close Toilet Seat – Premium Urea Formaldehyde, Porcelain-Like Finish, Quick Release, Adjustable Top Fixing Hinges, Easy Clean, Standard Oval, Sleek White - Image 3](https://m.media-amazon.com/images/I/61Z6neFSpVL.jpg)
![Soft-Close Toilet Seat – Premium Urea Formaldehyde, Porcelain-Like Finish, Quick Release, Adjustable Top Fixing Hinges, Easy Clean, Standard Oval, Sleek White - Image 4](https://m.media-amazon.com/images/I/61Z8P+ZIw0L.jpg)
![Soft-Close Toilet Seat – Premium Urea Formaldehyde, Porcelain-Like Finish, Quick Release, Adjustable Top Fixing Hinges, Easy Clean, Standard Oval, Sleek White - Image 5](https://m.media-amazon.com/images/I/61bNYR6-+zL.jpg)

## Available Options

This product comes in different **Color, Number Of Items** options.

## Questions & Answers

**Q: Does the seat move around?**
A: Yes - even when it is upright it just wobbles around - then when you sit on it that wobbling is very unnerving.  Its not fit for purpose so I am sending mine back.  Cheap rubbish - spend a little more and get a better quality seat.

**Q: is the loo seat easy to fit especially for someone with RSI**
A: I have limited movement and found it very easy to fit, tip; do not over tighten and read the instructions at least three times as it comes with two fittings, you can only use one. Cleaning afterwards is so easy it unclips

**Q: Does this fit a RAK 600 series toilet**
A: Sorry, I just took the measurements and shape.

**Q: What is the width of the pan hole? Its length is given as 285mm but the width is not given**
A: Just measured the width of the pan hole and I get 221 cms

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Seat. Easy to fit
*by D***E on 5 July 2026*

Review for OVAL SIGNATURE seat. I’ve had this toilet seat for two years now, and it still works perfectly. The soft-close mechanism hasn't skipped a beat or become loose, and the finish looks as clean as the day I bought it. I purchased another one this year (2026) for my other toilet. I’ve noticed a fair few reviews complaining that it’s difficult or frustrating to fit, but honestly, they must be doing it wrong. It took me less than 10 minutes total to get the old seat completely off and have this new one securely fitted. The instructions are clear, the fittings are straightforward, and everything lines up exactly as it should if you take a second to look at it. If you're on the fence because of people struggling with the installation, don't worry about it. It’s a quick job, a perfect fit, and built to last. Brilliant value for money. The black rubber like fitting you just force it through the holes on the toilet (it requires a bit of force and squeezing of the bung but it fits snugly) then you just literally screw the seat into the bung.. that's it Pros: • Built to last: Two years of daily use and the soft-close feature still works flawlessly. • Super quick installation: Took me less than 10 minutes to remove the old seat and fit this one. • Great finish: Easy to clean and keeps its premium look over time. • Solid fit: Doesn't slide around or loosen up like cheaper alternatives. • Made of a strong heavy plastic resin (Premium Urea Formaldehyde) Cons: • User error in reviews: Some buyers seem to struggle with installation, but as long as you follow the steps, it's incredibly simple.

### ⭐⭐⭐⭐⭐ Top fixing is a dream...
*by B***Y on 5 May 2022*

Delighted with this loo seat. Fitting was easy, features are outstanding, completely non-slip. We have a 'modern' style bathroom suite which, to be honest, would be better off in a skip. The design is just perfect for not being able to get your arm around, under, over, through, whatever, to fasten anything. What should be the easiest of DIY jobs becomes a bone crunching nightmare. Last time we had a new seat (about 5 years ago) it took two of us just to hold the bolts and washers on so we could tighten it up, it really is almost impossible to reach the underneath of the bolts. Then we discovered these 'top fixing' loo seats and bolts. I was a bit sceptical but ordered one to take a chance. It's fantastic!! Extremely easy to fit, didn't need the instructions at all. The top fixing rubber bungs fit our pan superbly, nice and tight straight away, rock solid after the bolts were tightened. A great feature is the removable seat section so if the bolts become loose they can be tightened up in 60 seconds. The placement 'lugs' on the bottom of the seat (the bits that land on the pan rim) are made of a solid material that's completely non-slip on our pan. Even if the bolts came out completely I can't see this moving very far. Even with the bolts tight, there is some slight movement of the whole seat assembly, but this isn't because it's becoming loose, it's just the play where the removeable seat fixes into the mounting bolts. We love the soft close as well. Sooooo many times I've woken up in the night to pee, crept around the room, quietly gone into the loo then dropped the old seat with one hell of a crash. Not possible anymore. Bliss. I made just one change to the manufacturers intentions for fitting. There are two lengths of bolts provided, short for top fixing and long for bottom fixing. I used the long bolts but still used the top fixing method. I did this so that we could practice our contortion and bone breaking yoga skills to try to get the bottom bolts on as well if necessary. I genuinely don't think we'll need to do this.

### ⭐⭐⭐⭐ Perfect Size, But Very Fragile - Great Customer Suppor (Oval Shape) t
*by A***O on 11 April 2023*

Size wise, this lid fitted perfectly on our toilet and as advertised. Unfortunately the hinges would start to bend every time the seat and/or the lid were closed. Quality wise, it is not a bad toilet seat, but is not good quality either. The plastic felt very fragile. The toilet seat had also poor stability and it would wobble on the hinges. Assembly took a bit of time, but it was straightforward. The soft close worked like a charm, really smooth. The quick release buttons worked well to remove the seat and was easy to place the seat back in place. The only issue was that one of the buttons wouldn't hook into the hinge right away and needed a little bit of pressure. Both the toilet and the fittings didn't had the best of quality and we felt it wouldn't last long until it would break. Unfortunately we returned the seat, the return process was smooth. Giving 4 stars as the manufacturer was supportive and tried to help out; quick reply to our emails and gave us options to help sort out the hinges problem. Really great customer support.

## Frequently Bought Together

- Mass Dynamic Soft-Close Toilet Seat – Quick Release, Adjustable Top Fixing Hinges, Durable Urea Formaldehyde, Easy Clean, Standard Oval, Sleek White Finish
- Mass Dynamic Square Toilet Seat Features Soft-Close, One-Button Quick Release for Hassle-Free Cleaning, Top Fixing Adjustable Hinges, and A Standard 460mm x 360mm Size. Sleek Practical Design

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-11-12*