---
product_id: 230231850
title: "9 Inches to 13 Inches Office Chair Cylinder Replacement, 4'' Stroke, Heavy Duty 1000 lbs, Hydraulic Pneumatic Shock Piston, Universal Gas Cylinder Fit for Most Office Chairs, Class 4 (Black)"
brand: "mastery mart"
price: "¥11182"
currency: JPY
in_stock: true
reviews_count: 8
category: "Mastery Mart"
url: https://www.desertcart.jp/products/230231850-9-inches-to-13-inches-office-chair-cylinder-replacement-4
store_origin: JP
region: Japan
---

# 4-inch adjustable height stroke 360° smooth swivel rotation Class 4 heavy-duty steel build 9 Inches to 13 Inches Office Chair Cylinder Replacement, 4'' Stroke, Heavy Duty 1000 lbs, Hydraulic Pneumatic Shock Piston, Universal Gas Cylinder Fit for Most Office Chairs, Class 4 (Black)

**Brand:** mastery mart
**Price:** ¥11182
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your office throne with power, precision, and premium durability!

## Quick Answers

- **What is this?** 9 Inches to 13 Inches Office Chair Cylinder Replacement, 4'' Stroke, Heavy Duty 1000 lbs, Hydraulic Pneumatic Shock Piston, Universal Gas Cylinder Fit for Most Office Chairs, Class 4 (Black) by mastery mart
- **How much does it cost?** ¥11182 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/230231850-9-inches-to-13-inches-office-chair-cylinder-replacement-4)

## Best For

- mastery mart enthusiasts

## Why This Product

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

## Key Features

- • **Built to Endure:** Class 4 gas cylinder supports up to 1000 lbs, engineered with premium alloy steel for unmatched durability.
- • **Universal Compatibility:** Fits most office chairs including premium brands like Herman Miller Aeron—measure once, upgrade forever.
- • **Say Goodbye to Chair Sinking:** Reliable hydraulic piston eliminates annoying seat drop, keeping your posture steady all day long.
- • **Elevate Your Workspace Comfort:** Adjust your chair height effortlessly with a 4-inch stroke for perfect desk alignment.
- • **Hassle-Free Installation & Support:** Quick replacement with simple tools plus dedicated customer service ensures zero downtime.

## Overview

This Mastery Mart Class 4 office chair gas cylinder replacement offers a 4-inch adjustable height range, fits most office chairs with a 2-inch outer diameter, and supports up to 1000 lbs. Crafted from heavy-duty alloy steel, it guarantees smooth 360-degree swivel and eliminates sinking issues, making it the ultimate upgrade for professional workspaces.

## Description

Buy 9 Inches to 13 Inches Office Chair Cylinder Replacement, 4'' Stroke, Heavy Duty 1000 lbs, Hydraulic Pneumatic Shock Piston, Universal Gas Cylinder Fit for Most Office Chairs, Class 4 (Black): Furniture Accessories - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Perfect Fit and Works Exactly as Expected - Great replacement cylinder! The size was spot-on, installation was straightforward, and it brought my chair right back to the height and stability it originally had. Smooth lift, solid feel, and no sinking issues at all. Exactly what I needed highly recommend if you’re repairing or upgrading an office chair.
Review: Steel Case Leap V2 - Works great with my Steel Case Leap V2. The previous strut never worked all that great but this new one is soft and doesnt drop down. I went with a taller one to fit my desk heigh of 36" and its a perfect match with the 11-17 inch.

## Features

- 🏆【Adjustable Height 4 inches】The compressed length is 9.88 inches (251mm), the fully expanded length is 13.6 inches (346mm), travel length is 4 inches, which allows your chairs to rise higher. (Note: Please measure the length of the outer cylinder before purchase).
- 🏆【Universal Fit Size for Most Chairs】The outer column cylinder diameter connected to the base is 2 inches (50mm), and the piston shaft diameter connected to the chair is 1-1/8" (28mm). This pneumatic piston cylinder will fit almost every office chair on the market including Herman Miller Aeron. Please confirm these measurements before making a purchase. Not compatible with 1KEA and some other brands.
- 🏆【Upgraded Class 4 Gas Cylinder】Mastery Mart's office chair cylinder replacement is made of premium steel. This heavy-duty gas lift cylinder is manufactured to meet the highest industry standard (BIFMA/ANSI). The pneumatic lift replacement supports up to 1000 lbs.
- 🏆【Eliminate Sinking Concerns】Prevent sinking issues by removing the old cylinder using a hammer or wrench. Simply assemble our new cylinder into the base and attach the seat. Our office chair lift provides seamless 360-degree rotation.
- 🏆【100% Satisfaction Guaranteed】For any issues with using our chair shock replacement, please don't hesitate to contact us. We are here to provide guidance, offer replacements, or process refunds, depending on your specific case. Your satisfaction is our priority.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0859WG3X8 |
| Additional Features | Durable, Easy to Replace and Install, Heave Duty, Quality Guaranteed, Universal Fit |
| Age Range Description | Adult |
| Arm Style | Armless |
| Back Style | Mid Back |
| Best Sellers Rank | #6,701 in Office Products ( See Top 100 in Office Products ) #149 in Office Furniture Accessories |
| Brand | MASTERY MART |
| Brand Name | MASTERY MART |
| Color | Matte Black |
| Customer Reviews | 4.5 out of 5 stars 2,775 Reviews |
| Fill Material | Foam |
| Frame Material Type | Alloy Steel |
| Furniture Base Movement | Swivel |
| Indoor Outdoor Usage | Indoor |
| Is Customizable? | No |
| Is Foldable | No |
| Item Dimensions D x W x H | 9.8"D x 2"W x 2"H |
| Item Height | 5 centimeters |
| Item Weight | 0.8 Kilograms |
| Leg Style | Straight Leg |
| Manufacturer | Mastery Mart Inc. |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Maximum Weight Recommendation | 1000 Pounds |
| Model Number | GAS-LIFT-GL |
| Pattern | Solid |
| Product Dimensions | 9.8"D x 2"W x 2"H |
| Reclining Position Count | 1 |
| Room Type | Office |
| Seat Material | Fabric |
| Size | 4'' Travel Length |
| Style Name | Solid |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** MASTERY MART
- **Color:** Matte Black
- **Material:** Alloy Steel
- **Product Dimensions:** 9.8"D x 2"W x 2"H
- **Size:** 4'' Travel Length

## Images

![9 Inches to 13 Inches Office Chair Cylinder Replacement, 4'' Stroke, Heavy Duty 1000 lbs, Hydraulic Pneumatic Shock Piston, Universal Gas Cylinder Fit for Most Office Chairs, Class 4 (Black) - Image 1](https://m.media-amazon.com/images/I/51vgc3GW7CL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: How durable is this gas lift?**
A: The office chair cylinder is made from high-strength alloy steel, high-quality thickened outer steel, high safety and explosion-proof. The gas lift cylinder has passed SGS official test and BIFMA certification, highest safety Class 4.

**Q: Will this chair cyinder fit on the herman miller aeron office chair?**
A: Yes, our cylinder measures 1-1/8” (28mm) at the top, where it fits into the chair seat, shaft diameter 2” (50mm) at the bottom, where it fits into the chair base, you can measure your original cylinder before ordering.

**Q: What are the measurements of the cylinder, shortest and longest height as well as overall length and width?**
A: Top of the cylinder: 1-1/8”, Shaft diameter：2”, Shortest and longest height for 4“ stroke ( 9.88 Inches -13.6 Inches ); 4.5“ stroke ( 10.7 Inches -15.2 Inches ); 5.5“ stroke ( 11.7 Inches -17.2 Inches ); 8“ stroke ( 14 Inches -21.8 Inches ).

**Q: Will this chair cyinder work for 1KEA office chair?**
A: No.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect Fit and Works Exactly as Expected
*by Y***H on December 11, 2025*

Great replacement cylinder! The size was spot-on, installation was straightforward, and it brought my chair right back to the height and stability it originally had. Smooth lift, solid feel, and no sinking issues at all. Exactly what I needed highly recommend if you’re repairing or upgrading an office chair.

### ⭐⭐⭐⭐⭐ Steel Case Leap V2
*by J***L on January 13, 2026*

Works great with my Steel Case Leap V2. The previous strut never worked all that great but this new one is soft and doesnt drop down. I went with a taller one to fit my desk heigh of 36" and its a perfect match with the 11-17 inch.

### ⭐⭐⭐⭐⭐ Helped Avoid Cost of A New Chair - FIXED!
*by A***E on November 15, 2025*

My office chair turned out to be a disappointment after the backrest wouldn't stay up due to the plastic turn knob not staying tight no matter what I did. Then when my chair started to lose its lift on a regular basis I thought I would have to buy a new chair. I would sit down at my desk and realize I was sitting at the same height as a child does. Sad, because my previous chair lasted about 18 years. When I discovered this gas lift cylinder replacement I thought it would be worth a try to mitigate the expense of a new chair. I took the measurements from my chair in regards to how far it lifted from where it bottomed out to where it extended to and determined the 4.5" stroke height was the one I needed. I didn't know what "stroke height" was but I figured it out. Once I received it, I needed to remove the old cylinder, which was the HARDEST part of the task. I removed one end with a few hardy smacks with a hammer as illustrated on YouTube. Additionally, after unsuccessfully removing the other end with a pipe wrench as instructed, I had to disassemble the chair's mechanism to dislodge the end of it that was completely stuck in the chair pan. It took some creativity to get it done, but after about an hour of trial and error I got the old one out. At that point installing this new cylinder was SUPER easy. It fit exactly like it was supposed to. The chair is fixed! And I even fixed the other problem of the backrest not staying in position after seeing a fix on YouTube while looking at videos for installing a new chair cylinder. Now my chair is actually better than it was to begin with. The chair is stable and raises and lowers well. I look forward to an uplifting experience from this point forward (pun intended). I would recommend this fix to anyone who wants to save $150-$200+ on a new chair.

## Frequently Bought Together

- 9 Inches to 13 Inches Office Chair Cylinder Replacement, 4" Stroke, Heavy Duty 1000lbs, Hydraulic Pneumatic Shock Piston, Universal Gas Cylinder Fit for Most Office Chairs, Class 4, Black
- Besitu 500Lbs Office Chair Replacement Parts, w/ 6'' x 10.2" Mounting Holes Chair Base Heavy Duty Plate Swivel Tilt Control Seat Mechanism for Executive and Gaming Chairs
- MASTERY MART 28" Heavy Duty Office Chair Base Replacement Parts, 2500 Lbs, Desk Chair Reinforced Metal Leg with Universal Gas Cylinder Hole and Casters Sockets, Matte Black

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-24*