---
product_id: 557687468
title: "MASTERY MART 11 Inches-17 Inches Long Office Chair Gas Lift Cylinder Replacement, 5.5\" Stroke, Heavy Duty 1000 lbs, Universal Gas Cylinder for Most Office Chair, Class 4 (Not for 1KEA, Black)"
brand: "mastery mart"
price: "¥15191"
currency: JPY
in_stock: true
category: "Mastery Mart"
url: https://www.desertcart.jp/products/557687468-mastery-mart-11-inches-17-inches-long-office-chair-gas
store_origin: JP
region: Japan
---

# 5.5" adjustable stroke 360° smooth swivel Class 4 heavy-duty steel MASTERY MART 11 Inches-17 Inches Long Office Chair Gas Lift Cylinder Replacement, 5.5" Stroke, Heavy Duty 1000 lbs, Universal Gas Cylinder for Most Office Chair, Class 4 (Not for 1KEA, Black)

**Brand:** mastery mart
**Price:** ¥15191
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your throne with power and precision!

## Quick Answers

- **What is this?** MASTERY MART 11 Inches-17 Inches Long Office Chair Gas Lift Cylinder Replacement, 5.5" Stroke, Heavy Duty 1000 lbs, Universal Gas Cylinder for Most Office Chair, Class 4 (Not for 1KEA, Black) by mastery mart
- **How much does it cost?** ¥15191 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/557687468-mastery-mart-11-inches-17-inches-long-office-chair-gas)

## 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:** Premium alloy steel construction supports up to 1000 lbs with Class 4 certification.
- • **Elevate Your Comfort:** 5.5-inch adjustable height stroke for personalized seating elevation.
- • **360° Seamless Rotation:** Enjoy smooth swivel motion for dynamic work and gaming sessions.
- • **Effortless Installation:** Quick swap design eliminates sinking issues and restores chair stability fast.
- • **Universal Compatibility:** Fits most office chairs including Herman Miller Aeron (except 1KEA).

## Overview

The MASTERY MART Office Chair Gas Lift Cylinder Replacement offers a robust 5.5-inch adjustable height stroke, crafted from premium alloy steel with a heavy-duty Class 4 rating supporting up to 1000 lbs. Designed for universal fit across most office chairs (excluding 1KEA), it ensures smooth 360-degree swivel and easy installation, eliminating common sinking problems and restoring ergonomic comfort for professionals and gamers alike.

## Description

MASTERY MART 11 Inches-17 Inches Long Office Chair Gas Lift Cylinder Replacement, 5.5" Stroke, Heavy Duty 1000 lbs, Universal Gas Cylinder for Most Office Chair, Class 4 (Not for 1KEA, Black) : desertcart.co.uk: Home & Kitchen

## Features

- 🏆【Adjustable Height 5.5 inches】The compressed length is 11.69 inches (297mm), the fully expanded length is 17.2 inches (437mm), sinking length is 1/2” (13mm), stroke length is 5.5 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 lift has a maximum capacity of 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 | B099R8HLS4 |
| Adjustable Seat Height Maximum | 437 Millimetres |
| Adjustable Seat Height Minimum | 297 Millimetres |
| Age Range Description | Adult |
| Arm Style | Armless |
| Assembly Instructions Description | No assembly required |
| Back Style | Mid Back |
| Best Sellers Rank | 45,847 in DIY & Tools ( See Top 100 in DIY & Tools ) 922 in Furniture Hardware |
| Brand Name | MASTERY MART |
| Colour | Matte Black |
| Country Of Origin | China |
| Customer Reviews | 4.5 4.5 out of 5 stars (445) |
| Form Factor | Swivel chair |
| Frame Material Type | Alloy Steel |
| Furniture Base Movement | Swivel |
| Included Components | Office Chair Gas Cylinder |
| Indoor Outdoor Usage | Indoor |
| Is Assembly Required? | No |
| Is Customizable? | No |
| Is Extendable | No |
| Item Depth | 29 cm |
| Item Dimensions | 30 x 5.5 x 5.5 centimetres |
| Item Dimensions D x W x H | 29D x 5W x 5H centimetres |
| Item Shape | Rectangular |
| Item Weight | 2 Pounds |
| Leg Style | wheels |
| Manufacturer | Mastery Mart Co., Limited |
| Manufacturer Part Number | MM-REP-GL04 |
| Material Type | Alloy Steel |
| Model Name | Office Chair Gas Cylinder |
| Model Number | GAS-LIFT-GL |
| Number of Items | 1 |
| Number of Packs | 1 |
| Pattern | Solid |
| Reclining Position Count | 1 |
| Recommended Uses For Product | Office |
| Room Type | Office |
| Seat Material Type | Polyester |
| Size | 11-17 Inches, 5.5'' Travel Length |
| Sleeping Bag Filling Material | Foam |
| Special Features | Adjustable Height |
| Style Name | Solid |
| Tilting | No |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** MASTERY MART
- **Colour:** Matte Black
- **Material:** Alloy Steel
- **Product dimensions:** 29D x 5W x 5H centimetres
- **Size:** 11-17 Inches, 5.5'' Travel Length

## Images

![MASTERY MART 11 Inches-17 Inches Long Office Chair Gas Lift Cylinder Replacement, 5.5" Stroke, Heavy Duty 1000 lbs, Universal Gas Cylinder for Most Office Chair, Class 4 (Not for 1KEA, Black) - Image 1](https://m.media-amazon.com/images/I/41qa01Qdv-L.jpg)

## Available Options

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

## Questions & Answers

**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 ); 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.

## Frequently Bought Together

- 11 Inches-17 Inches Office Chair Gas Lift Cylinder Replacement, Tall Chair Cylinder 5.5" Stroke, Hydraulic Pneumatic Shock Piston, Heavy Duty 1000lbs, Fit for Most Office Chairs, BIFMA/Class 4 (Black)
- Mastery Mart Office Chair Caster Wheels for Hardwood Floors, Heavy Duty and Quiet Smooth Rollerblade Wheels for Office Chair, Universal Size (11x22mm), Suitable for Most 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: 2026-11-13*