---
product_id: 48844100
title: "BiMi Heavy Duty Class 4 Replacement Black 9\" Gas Lift for an Office Chair"
brand: "bimi"
price: "NT$2360"
currency: TWD
in_stock: true
url: https://www.desertcart.tw/products/48844100-bimi-heavy-duty-class-4-replacement-black-9-gas-lift
store_origin: TW
region: Taiwan
---

# 9" gas lift extends to 15" Precision tapered diameters 50mm & 28mm Load tested to 160kg BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair

**Brand:** bimi
**Price:** NT$2360
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your workspace with power and precision!

## Quick Answers

- **What is this?** BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair by bimi
- **How much does it cost?** NT$2360 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/48844100-bimi-heavy-duty-class-4-replacement-black-9-gas-lift)

## Best For

- bimi enthusiasts

## Why This Product

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

## Key Features

- • **Easy Installation:** Simple assembly lets you upgrade your chair in minutes and get back to work
- • **Perfect Fit Precision:** Tapered 50mm base and 28mm seat diameters ensure flawless compatibility
- • **Smooth Height Adjustment:** 9-inch gas lift extends seamlessly to 15 inches for personalized comfort
- • **Built to Endure Heavy Use:** Supports up to 160kg for ultimate durability and peace of mind
- • **Sleek Contemporary Design:** Matte black finish complements any modern office aesthetic

## Overview

The BiMi Heavy Duty Class 4 9" Gas Lift is a robust, certified office chair replacement part designed to support up to 160kg. Featuring a 9-inch casing that extends to 15 inches, it offers smooth height adjustment with tapered diameters (50mm base, 28mm seat) for perfect fitment. Finished in sleek black metal, it combines durability with contemporary style, making it an essential upgrade for any professional workspace.

## Description

Full description not available

## Features

- Load tested to 160Kgs
- 9" Gas Lift - Casing 9" (230mm) extends To 15" (380mm)
- Certified
- Diameters Are 50mm (tapered to fit) At Chair Base And 28mm (tapered to fit) At Seat Mechanism

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Colour | Black |
| Product Dimensions | 5 x 23.5 x 23.01 cm; 1.02 kg |
| Is assembly required | Yes |
| Assembly type | Yes |
| Primary material | Metal |
| Type of wood | Metal |
| Style | Contemporary |
| Capacity | Medium (M) |
| Item shape | Irregular |
| Mattress comfort | Four-legged rocking |
| Care Instructions | Wipe Clean |
| Publisher code | SW5DH |
| Seat height | 15 Inches |
| Shipping weight | 1.02 Kilograms |
| Item Model Number | 50166 |
| Manufacturer | BiMi |
| Item model number | 50166 |
| ASIN | B004NLZU8E |

## Product Details

- **Brand:** BiMi
- **Colour:** Black
- **Size:** Medium (M)
- **Back style:** Solid Back
- **Special feature:** Adjustable Height

## Images

![BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair - Image 1](https://m.media-amazon.com/images/I/51SFmlpxNWL.jpg)
![BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair - Image 2](https://m.media-amazon.com/images/I/41aJbONZsKL.jpg)
![BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair - Image 3](https://m.media-amazon.com/images/I/41mE07yPGZL.jpg)
![BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair - Image 4](https://m.media-amazon.com/images/I/21ZJtF4Q1yL.jpg)
![BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair - Image 5](https://m.media-amazon.com/images/I/21cdyIKNCnL.jpg)

## Questions & Answers

**Q: Do these fit chairs that have a spring clip under the base.**
A: I think the spring clip you mention is part of the gas strut. On my chair both the top and bottom of the gas strut are slightly tapered and it is only the tapers that actually hold the chair seat and bottom section together. The replacement strut came with clear instructions advising use of a hammer to separate the old strut from both top and bottom parts of the chair. Once I knew this it only took me a couple of minutes to replace the old strut. Chair is like new now.

**Q: What is the weight this gas lift is designed for ? i.e. 100Kg, 125 Kg etc**
A: HiLoad tested up to 146Kgs

**Q: I have no idea what size to purchase.  My office chair takes up to 17 st, would you be able to advise me on what size gas lift to buy?**
A: How tall are you?  I weigh about 13.5 stone and 5.9".  With hindsight I would have fitted the 7" lift - not the 9" but I guess that's a matter of preference.The lift is certainly easy to fit  - assuming the fitting size is universal. Just knock the existing lift out top and bottom - it needs two or three solid whacks - and fit the new lift. No need to take the fitting off the chair - which I did - not knowing any better at the time.  Hope this helps - please feel free to come back.brok

**Q: I was wondering can you verify is this product is a class 4 cylinder? I'm looking it for a vertagear sl4000 chair.**
A: This will take up to 160kg as stated, the grade 4 is rated at up to 250kg. It should fit, but is not as highly rated as a class 4 gas lift.

## Frequently Bought Together

- BiMi Heavy Duty Class 4 Replacement Black 9" Gas Lift for an Office Chair
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**Shop now:** [https://www.desertcart.tw/products/48844100-bimi-heavy-duty-class-4-replacement-black-9-gas-lift](https://www.desertcart.tw/products/48844100-bimi-heavy-duty-class-4-replacement-black-9-gas-lift)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-13*