---
product_id: 733835678
title: "MASTERY MART Office Chair Gas Lift Cylinder Replacement, Heavy Duty 450 LBs/ 204 KGs, Universal Size Fits Most Office Chair and Swivel Chair, 6'' Length Extension,Highest End Class 4 (Matte Black)"
brand: "mastery mart"
price: "$67"
currency: NZD
in_stock: true
reviews_count: 5
category: "Mastery Mart"
url: https://www.desertcart.nz/products/733835678-mastery-mart-office-chair-gas-lift-cylinder-replacement-heavy-duty
store_origin: NZ
region: New Zealand
---

# 5.5-inch adjustable height stroke 360° smooth swivel rotation Class 4 heavy-duty steel cylinder MASTERY MART Office Chair Gas Lift Cylinder Replacement, Heavy Duty 450 LBs/ 204 KGs, Universal Size Fits Most Office Chair and Swivel Chair, 6'' Length Extension,Highest End Class 4 (Matte Black)

**Brand:** mastery mart
**Price:** $67
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your throne with Mastery Mart’s powerhouse lift — because your productivity deserves the best!

## Quick Answers

- **What is this?** MASTERY MART Office Chair Gas Lift Cylinder Replacement, Heavy Duty 450 LBs/ 204 KGs, Universal Size Fits Most Office Chair and Swivel Chair, 6'' Length Extension,Highest End Class 4 (Matte Black) by mastery mart
- **How much does it cost?** $67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/733835678-mastery-mart-office-chair-gas-lift-cylinder-replacement-heavy-duty)

## 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 Class 4 steel construction supports up to 450 lbs (204 kg) with unmatched durability.
- • **Elevate Your Comfort:** Adjustable 5.5-inch lift for perfect ergonomic height customization.
- • **Effortless Installation:** Quick, tool-friendly replacement that revives your chair’s original smoothness and height.
- • **Universal Compatibility:** Fits most office and swivel chairs, including premium brands like Herman Miller Aeron.
- • **Say Goodbye to Chair Sinking:** Reliable gas lift mechanism eliminates annoying sinking issues for consistent stability.

## Overview

The MASTERY MART Office Chair Gas Lift Cylinder Replacement is a universal, heavy-duty Class 4 gas lift designed to fit most office chairs. With a 5.5-inch adjustable height stroke and a robust steel build supporting up to 450 lbs, it ensures smooth, stable, and reliable chair height adjustment. Easy to install and engineered to eliminate sinking issues, this matte black cylinder revitalizes your workspace comfort and functionality.

## Description

gas lift

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: High Quality! - Fits perfectly!

## 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 |
| Age Range Description | Adult |
| Arm Style | Armless |
| Back Style | Mid Back |
| Best Sellers Rank | #670,804 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #1,598 in Home Office Desk Chairs |
| Brand | Mastery Mart |
| Colour | Matte Black |
| Country of Origin | China |
| Customer Reviews | 4.5 out of 5 stars 934 Reviews |
| Frame Material | Alloy Steel |
| Furniture Base Movement | Swivel |
| Included Components | Office Chair Gas Cylinder |
| Indoor Outdoor Usage | Indoor |
| Is Assembly Required? | No |
| Is Customisable? | No |
| Item Depth | 29 centimeter |
| Item Dimensions | 30 x 5.5 x 5.5 Centimeters |
| Item Dimensions D x W x H | 29D x 5W x 5H Centimeters |
| Item Weight | 1.2 Kilograms |
| Leg Style | Straight Leg |
| Manufacturer | Mastery Mart Co., Limited |
| Material | Alloy Steel |
| Maximum Weight Recommendation | 454 Kilograms |
| Model number | GAS-LIFT-GL |
| Product Dimensions | 29D x 5W x 5H Centimeters |
| Product Features | Adjustable Height |
| Reclining Position Count | 1 |
| Recommended Uses For Product | Office |
| Room Type | Office |
| Seat Material Type | Polyester |
| Shape | Rectangular |
| Size | 6'' Travel Length |
| Style | Solid |
| Tilting | No |
| Unit Count | 1 Count |
| Wood Type | Alloy Steel |

## Product Details

- **Brand:** Mastery Mart
- **Colour:** Matte Black
- **Material:** Alloy Steel
- **Product Dimensions:** 29D x 5W x 5H Centimeters
- **Size:** 6'' Travel Length
- **Item Weight:** 1.2 Kilograms
- **Back Style:** Mid Back
- **Frame Material:** Alloy Steel
- **Special Feature:** Adjustable Height
- **Net Quantity:** 1 Count

## Images

![MASTERY MART Office Chair Gas Lift Cylinder Replacement, Heavy Duty 450 LBs/ 204 KGs, Universal Size Fits Most Office Chair and Swivel Chair, 6'' Length Extension,Highest End Class 4 (Matte Black) - Image 1](https://m.media-amazon.com/images/I/41p-aRp3OcL.jpg)

## 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”,

**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 11 December 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.

### ⭐⭐⭐⭐⭐ High Quality!
*by A***R on 7 January 2026*

Fits perfectly!

### ⭐ وصف المنتج غير صحيح
*by H***R on 22 September 2025*

يجب ذكر انه قطعة للكرسي و ليس كرسي

## 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 New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-02*