---
product_id: 241985461
title: "MingYi.office Gas Cylinder Heavy Duty for Herman Miller Classic Aeron Chair as Replacement"
brand: "mingyi.office"
price: "R3090"
currency: ZAR
in_stock: true
reviews_count: 7
category: "Ming Yi.Office"
url: https://www.desertcart.co.za/products/241985461-mingyi-office-gas-cylinder-heavy-duty-for-herman-miller-classic
store_origin: ZA
region: South Africa
---

# 4.5-inch smooth seat height travel Class 4 heavy-duty pneumatic lift 350 lbs load capacity, ANSI/BIFMA certified MingYi.office Gas Cylinder Heavy Duty for Herman Miller Classic Aeron Chair as Replacement

**Brand:** mingyi.office
**Price:** R3090
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your Aeron experience — precision, power, and peace of mind in one lift!

## Quick Answers

- **What is this?** MingYi.office Gas Cylinder Heavy Duty for Herman Miller Classic Aeron Chair as Replacement by mingyi.office
- **How much does it cost?** R3090 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/241985461-mingyi-office-gas-cylinder-heavy-duty-for-herman-miller-classic)

## Best For

- mingyi.office enthusiasts

## Why This Product

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

## Key Features

- • **Built to Endure:** Class 4 gas cylinder engineered to support up to 350 pounds, exceeding industry safety standards.
- • **Seamless Compatibility:** Designed exclusively for Herman Miller Classic Aeron chairs (1996-2012) sizes A, B, and C.
- • **Upgrade Your Workspace:** Restore your iconic Aeron chair’s premium comfort and stability with a reliable, OEM-grade replacement.
- • **Precision Height Control:** Effortlessly adjust your Aeron chair with a 4.5-inch stroke for perfect ergonomic positioning.
- • **Trusted Quality Assurance:** Backed by a 5-year replacement warranty and manufactured by Samhongsa, a leader in office chair cylinders.

## Overview

The MingYi.office Class 4 pneumatic gas cylinder is a heavy-duty replacement part designed specifically for Herman Miller Classic Aeron chairs made between 1996 and 2012. Featuring a 4.5-inch seat height adjustment stroke, a robust 350-pound load capacity, and compliance with ANSI/BIFMA5.1-2011 standards, this cylinder ensures smooth, reliable chair height control. Manufactured by Samhongsa, a trusted industry leader, it comes with a 5-year warranty, making it a durable and compatible upgrade for restoring your Aeron chair’s ergonomic performance.

## Description

Product description Package Include: 1 x gas cylinder(chair not included.)Samhongsa was founded in 1971, is a professional production and sales of Cylinder for office chair. Samhongsa have advanced production equipment and testing equipment and improved management system. Samhongsa always insist on the operation idea of “human-oriented, honesty first, lean management and excellence” Providing perfect quality and service for users and possess the good reputation. Samhongsa’s cylinder have acquired and through eight world standards certifications(Such as: BIFMA；LGA；TUV；SGS, ect.). Samhongsa have built a friendly, long-term with Herman Miller, Allsteel, Steelcase, HON, etc. world-renowned brands. Only For Aeron chair made between 1996-2012. Safety Warning For indoor use only. Recommended for the office.

Review: Heavy Duty It Is NOT! Cheap and Nasty and Will Not Last - On arrival this gas cylinder looked excellent. Well packaged and arrived quickly. Instructions were almost non-existent - "go find a YouTube video...." - and no mention of the tools you would need (a pipe wrench and a solid, non-damaging mallet). However, I overcame these obstacles quite easily and managed to get it swapped over. My original chair gas cylinder for my Herman Miller Classic Aeron Chair has lasted from 2004 until 2023 and took a bit of effort to remove, but I got it removed and replaced it with this and made the necessary adjustments so it worked perfectly - hooray! After just 2 days I noticed the chair felt a little wobbly from side to side and front to back. Everytime I move in the chair it feels more unstable. The photo shows where the top part of the wider section of the cylinder seems to be coming away from the main section, and this is what is causing the wobbling. The video shows the actual extent of the problem, with the top part rocking from side to side, and this is getting worse every day and I'm sure will eventually break away completely. I'll be returning this and buying something else.
Review: broke within a few months - Unfortunately this cyliner only worked for a few months before it started to leak...

## Features

- Listing is for a brand new never used CLASS 4, office chair seat height adjustment pneumatic gas lift cylinder. 4.5" stroke (seat travel from lowest to highest settings).
- Exceeds ANSI/BIFMA5.1-2011 standards, based on the specs of this cylinder, it's load capacity is 350 pounds.
- Length Compressed: 11.5" Fully Extended: 16" Travel: 4.5", Cylinder Diameter: 28mm (1.1") Column Diameter: 50mm (approx 2")
- After install, If the chair can't lift normally. Two screws located near where the cable attaches need to be adjusted, see photo 2.
- Cylinder for Aeron Chair Size A, B and C, offer 5 years replacement warranty.Only For Aeron chair made between 1996-2012.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07QF8XDCQ |
| Age Range Description | Adult |
| Arm Style | Armless |
| Assembly Instructions Description | Already assembled |
| Back Style | Mesh Back |
| Best Sellers Rank | 1,533,336 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 2,964 in Desk Chairs |
| Brand | MingYi.office |
| Brand Name | MingYi.office |
| Chair Backrest Width | 420 Millimetres |
| Colour | Black |
| Cushion Style | Boxed Edge |
| Customer Reviews | 4.4 out of 5 stars 281 Reviews |
| Finish Type | Unfinished |
| Form Factor | Swing chair with mesh back and height adjustment |
| Frame Material Type | Metal |
| Furniture Base Movement | Glide |
| Furniture Finish | Alloy Steel |
| Included Components | Gas Cylinder |
| Indoor Outdoor Usage | Indoor |
| Is Assembly Required? | No |
| Is Customizable? | No |
| Is Electric | No |
| Is Foldable | No |
| Item Depth | 16 inches |
| Item Dimensions | 6 x 6 x 30 centimetres |
| Item Dimensions D x W x H | 63.5D x 63.5W x 63.5H centimetres |
| Item Shape | Cylindrical |
| Item Weight | 1.13 kg |
| Item weight | 1.13 kg |
| Leg Style | Sled Base |
| Manufacturer | Samhongsa |
| Manufacturer Part Number | Cylinder-H |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Maximum Weight Recommendation | 158.76 kg |
| Model Name | Classic Aeron |
| Model Number | Cylinder-H |
| Number of Height Positions | 1 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Pattern | Solid |
| Product Care Instructions | Wipe Clean |
| Product dimensions | 63.5D x 63.5W x 63.5H centimetres |
| Reclining Position Count | 1 |
| Recommended Uses For Product | Office |
| Room Type | Office |
| Seat Back Interior Height | 450 Millimetres |
| Seat Depth | 45 centimetres |
| Seat Height | 16 Inches |
| Seat Length | 560 |
| Seat Material Type | Foam |
| Size | 2D x 2W x 11.8H in |
| Sleeping Bag Filling Material | Foam |
| Style Name | Contemporary |
| Surface Recommendation | Hard Floor |
| Theme | Modern |
| Tilting | No |
| UPC | 778862838788 743832019153 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** MingYi.office
- **Colour:** Black
- **Material:** Alloy Steel
- **Product dimensions:** 63.5D x 63.5W x 63.5H centimetres
- **Size:** 2D x 2W x 11.8H in

## Images

![MingYi.office Gas Cylinder Heavy Duty for Herman Miller Classic Aeron Chair as Replacement - Image 1](https://m.media-amazon.com/images/I/41YGR3Z6a9L.jpg)

## Questions & Answers

**Q: Does this make the chair taller?**
A: Yes, it makes the chair Taller. The original Herman Miller cylinder sit about 2 inches past the wheel base. The heavy duty cylinder sold here sits taller as it doesn’t go past the base.
Hope this helps!

**Q: What are the bottom taper dimensions?**
A: about 45mm, thank you!

**Q: does this come with the bearing already installed**
A: Yes, the bearing installed already, Inside outer tube, thank you!

**Q: How can you tell how old the chair is (if it is between 1996 and 2012)?**
A: Check the serial number and or Part numbers on the chair. Call the manufacturer my chair was a Herman Miller chair and they were able to tell me when it was sold to me and that I had a 10-year warranty... S0 the numbers on the chair sometimes indicate MFG year. Good Luck

## Customer Reviews

### ⭐ Heavy Duty It Is NOT! Cheap and Nasty and Will Not Last
*by G***C on 29 May 2023*

On arrival this gas cylinder looked excellent. Well packaged and arrived quickly. Instructions were almost non-existent - "go find a YouTube video...." - and no mention of the tools you would need (a pipe wrench and a solid, non-damaging mallet). However, I overcame these obstacles quite easily and managed to get it swapped over. My original chair gas cylinder for my Herman Miller Classic Aeron Chair has lasted from 2004 until 2023 and took a bit of effort to remove, but I got it removed and replaced it with this and made the necessary adjustments so it worked perfectly - hooray! After just 2 days I noticed the chair felt a little wobbly from side to side and front to back. Everytime I move in the chair it feels more unstable. The photo shows where the top part of the wider section of the cylinder seems to be coming away from the main section, and this is what is causing the wobbling. The video shows the actual extent of the problem, with the top part rocking from side to side, and this is getting worse every day and I'm sure will eventually break away completely. I'll be returning this and buying something else.

### ⭐ broke within a few months
*by B***A on 26 November 2024*

Unfortunately this cyliner only worked for a few months before it started to leak...

### ⭐⭐⭐⭐⭐ Excellent aftermarket cylinder for Aeron
*by A***1 on 21 September 2023*

This China aftermarket gas cylinder for Aeron was EASY to install, fit perfectly and worked immediately upon installation. I DID have an extremely difficult time removing the original HM cylinder from the chair. It had been there for decades. The online videos made the removal look way easier than it was. It took a number of overnight WD-40 soaking, the biggest heaviest pipe wrench I could get and a LOT of aggression in numerous sessions to incrementally move that old cylinder a few millimeters at a time. When it finally came out, the new one slipped in like a charm, what a surprise, it was a good quality purchase. The chair being an original HM Aeron would cost close to $1K to replace...and was a Great Incentive to put up with the hassle.

## Frequently Bought Together

- Gas Cylinder Heavy Duty for Herman Miller Classic Aeron Chair as Replacement
- Lumbar Support Pad Replacement for Herman Miller Classic Aeron Chair - Size B: Medium,Black
- Seat Pad Foam Insert Replacement for Herman Miller Classic Aeron Office Chair A B C Size (Black, A/B)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-09-18*