---
product_id: 456953868
title: "13 Inches-21 Inches Extra Long Gas Lift Cylinder Replacement, 8'' Stroke, Tall Hydraulic Pneumatic Shock Piston, Heavy Duty, Universal Fit for Drafting Chairs Bar Stools, Class 4 (Polished Steel)"
brand: "mastery mart"
price: "12741 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/456953868-13-inches-21-inches-extra-long-gas-lift-cylinder-replacement
store_origin: IS
region: Iceland
---

# 8'' adjustable height stroke 360° smooth swivel rotation Class 4 heavy-duty steel build 13 Inches-21 Inches Extra Long Gas Lift Cylinder Replacement, 8'' Stroke, Tall Hydraulic Pneumatic Shock Piston, Heavy Duty, Universal Fit for Drafting Chairs Bar Stools, Class 4 (Polished Steel)

**Brand:** mastery mart
**Price:** 12741 kr
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your seat, upgrade your hustle!

## Quick Answers

- **What is this?** 13 Inches-21 Inches Extra Long Gas Lift Cylinder Replacement, 8'' Stroke, Tall Hydraulic Pneumatic Shock Piston, Heavy Duty, Universal Fit for Drafting Chairs Bar Stools, Class 4 (Polished Steel) by mastery mart
- **How much does it cost?** 12741 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/456953868-13-inches-21-inches-extra-long-gas-lift-cylinder-replacement)

## 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 polished steel cylinder supports up to 1000 lbs, engineered for heavy-duty, long-lasting performance.
- • **Elevate Your Workspace:** 8-inch adjustable height stroke lets you customize your chair height for ultimate ergonomic comfort.
- • **Universal Compatibility:** Fits most office chairs including premium brands like Herman Miller Aeron—measure once, upgrade forever.
- • **Confidence in Every Click:** Backed by 100% satisfaction guarantee with responsive support, replacements, or refunds—your comfort, secured.
- • **Say Goodbye to Chair Sinking:** Replace your old gas lift easily and enjoy stable, reliable seating without annoying sink-downs.

## Overview

This Mastery Mart Class 4 gas lift cylinder offers an 8-inch adjustable height range with a polished steel finish, designed to fit most office chairs including high-end models. Engineered for durability, it supports up to 1000 lbs and ensures smooth 360-degree swivel motion, eliminating sinking issues for a reliable, ergonomic seating experience.

## Description

Full description not available

## Features

- 🏆【Adjustable Height 8 inches】The compressed length is 13.97 inches (355mm), the fully expanded length is 21.85 inches (555mm), travel length is 8 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 |
|---------------|-------|
| Brand | MASTERY MART |
| Color | Polished Steel |
| Size | 8'' Travel Length |
| Back Style | Mid Back |
| Unit Count | 1 Count |
| Style | Solid |
| Pattern | Solid |
| Room Type | Office |
| Age Range (Description) | Adult |
| Arm Style | Armless |
| Furniture base movement | Swivel |
| Indoor/Outdoor Usage | Indoor |
| Leg Style | wheels |
| Reclining Position Count | 1 |
| Manufacturer | Mastery Mart Co., Limited |
| Item Weight | 3.58 pounds |
| Product Dimensions | 14.96 x 2.17 x 2.17 inches |
| Item model number | GAS-LIFT-GL |
| Is Discontinued By Manufacturer | No |

## Product Details

- **Brand:** MASTERY MART
- **Color:** Polished Steel
- **Material:** Alloy Steel
- **Size:** 8'' Travel Length
- **Back Style:** Mid Back

## Images

![13 Inches-21 Inches Extra Long Gas Lift Cylinder Replacement, 8'' Stroke, Tall Hydraulic Pneumatic Shock Piston, Heavy Duty, Universal Fit for Drafting Chairs Bar Stools, Class 4 (Polished Steel) - Image 1](https://m.media-amazon.com/images/I/512Y8nx-L8L.jpg)
![13 Inches-21 Inches Extra Long Gas Lift Cylinder Replacement, 8'' Stroke, Tall Hydraulic Pneumatic Shock Piston, Heavy Duty, Universal Fit for Drafting Chairs Bar Stools, Class 4 (Polished Steel) - Image 2](https://m.media-amazon.com/images/I/71aWmsG0WOL.jpg)
![13 Inches-21 Inches Extra Long Gas Lift Cylinder Replacement, 8'' Stroke, Tall Hydraulic Pneumatic Shock Piston, Heavy Duty, Universal Fit for Drafting Chairs Bar Stools, Class 4 (Polished Steel) - Image 3](https://m.media-amazon.com/images/I/71nYvRE4b2L.jpg)
![13 Inches-21 Inches Extra Long Gas Lift Cylinder Replacement, 8'' Stroke, Tall Hydraulic Pneumatic Shock Piston, Heavy Duty, Universal Fit for Drafting Chairs Bar Stools, Class 4 (Polished Steel) - Image 4](https://m.media-amazon.com/images/I/81ky+-WHj7L.jpg)
![13 Inches-21 Inches Extra Long Gas Lift Cylinder Replacement, 8'' Stroke, Tall Hydraulic Pneumatic Shock Piston, Heavy Duty, Universal Fit for Drafting Chairs Bar Stools, Class 4 (Polished Steel) - Image 5](https://m.media-amazon.com/images/I/71wdncKUhDL.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”,

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

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-02*