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🪑 Upgrade your throne — sit smarter, work better!
The MASTERY MART Gas Lift Cylinder offers a robust 4-inch adjustable height range, crafted from premium Class 4 alloy steel to support up to 1000 lbs. Engineered for universal fitment with most office chairs including Herman Miller Aeron, this heavy-duty replacement ensures smooth 360-degree swivel and eliminates sinking issues. Easy to install and backed by a satisfaction guarantee, it’s the ultimate upgrade for professionals demanding durability and ergonomic precision.












| ASIN | B0859WG3X8 |
| Age Range Description | Adult |
| Arm Style | Armless |
| Assembly Instructions Description | Assembly required. Follow the instructions provided. |
| Back Style | Mid Back |
| Best Sellers Rank | 48,047 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 448 in Furniture Accessories |
| Brand | MASTERY MART |
| Brand Name | MASTERY MART |
| Colour | Matte Black |
| Country Of Origin | China |
| Customer Reviews | 4.6 out of 5 stars 2,456 Reviews |
| Fabric Type | No |
| Form Factor | swiveling |
| Frame Material Type | Metal |
| Furniture Base Movement | Swivel |
| Included Components | Office Chair Gas Cylinder |
| Indoor Outdoor Usage | Indoor |
| Is Assembly Required? | No |
| Is Customizable? | No |
| Is Foldable | No |
| Item Depth | 2 inches |
| Item Dimensions | 25 x 5 x 5 centimetres |
| Item Dimensions D x W x H | 25D x 5W x 5H centimetres |
| Item Shape | Round |
| Item Weight | 0.8 Kilograms |
| Item weight | 0.8 Kilograms |
| Leg Style | Straight Leg |
| Manufacturer | Mastery Mart Co., Limited |
| Manufacturer Part Number | MF-PT001 |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Maximum Weight Recommendation | 453.59 kg |
| Model Name | Office Chair Gas Cylinder |
| Model Number | GAS-LIFT-GL |
| Pattern | Solid |
| Product Care Instructions | Wipe Clean |
| Product dimensions | 25D x 5W x 5H centimetres |
| Reclining Position Count | 1 |
| Recommended Uses For Product | Office |
| Room Type | Office |
| Seat Depth | 24.9 centimetres |
| Seat Material Type | Fabric |
| Size | 4'' Travel Length |
| Sleeping Bag Filling Material | Foam |
| Special Features | Adjustable Height |
| Style Name | Solid |
K**N
Perfect for Vertagear gaming chairs.
Bought this to replace the piston in my aging Vertagear gaming chair. Perfect replacement. Gives the same lowest level with an extra 1inch/2.5cm of height. Easy to fit, well packaged and seems to work really well. Only time will tell on its longevity. TOP TIP: Be aware that there are varying low and height differences so be sure to measure your existing pistons lowest, highest, overall length and travel length. It's also a good idea to check the taper at the bottom of your existing pistons as not all pistons are equal in this area. This one sticks through the bottom quite a bit so if your wheel base is low to the ground it will probably hit the floor before the wheels. In that case go for one with less of a taper so not so much of the piston sticks out the bottom of your wheel base.
A**S
Good value cylinder which fitted the Corsair T3 Rush
MASTERY MART 9 Inches to 13 Inches Gas Lift Cylinder for Most Office Chair, Fitted a Corsair T3 rush gaming chair which the cylinder failed. I believe the Corsair chair has had two replacements cylinders with the last one lasting around 6 months before failing spectacularly. This fitted the gaming chair perfectly and is a good replacement. I'm hoping this last far more than 6 months so will update the review if anything happens. Installing the cylinder was easy enough i couldn't salvage the base plate due to the damage so i also had to replace the tilt plate and base with the wheel. Overall This so far is good and fitted perfectly well, good value comparing to the original which in my opinion fails fairly quickly and the person isn't at all heavy.
A**A
Good product, works perfectly, instant replacement. See below about removing the old cylinder!
The new cylinder was fine, fitted in seconds and works perfectly. The problem is removing the old one. No skill is needed, only a stillson wrench (the bigger, the better) a heavy hammer and brute strength! There are plenty of videos on YouTube, but basically you lay the chair on its side and clamp the stillson to the stem just below where it enters the chair. Then heave-ho, it isn't going to be easy! It doesn't matter which way you turn it, but you must force the tapered joint to release. It will help if whoever fitted it smeared it with grease first. When done, take the base unit outside and hit the base of the old cylinder really hard with a heavy hammer. Again, it's a tight taper fit and really heavy blows will be required. Once done, that's it - just pop the new one in. Don't forget to first replace any gaiters covering the cylinder, or you will be reaching for the stillson again!
M**N
Aeron compatability
Worked great. Installed on my MK2 Classic Aeron!
K**C
goes up , goes down
really pleased with the ram , obviously cheaper than a new chair , the only problem so far was getting the old one off
A**T
Good product - Recommended
The item arrived by the promised delivery date. It was relatively easy to fit and works well. The whole transaction was a breeze. Recommended.
M**W
Great Replacement but make sure you have a large hammer !
Great replcement, nice to sit properly again! Easy to fit is you follow the giudes on youtube abd have a big hammer!
M**E
good
good product
C**E
Es lo que requeria
Es funcional, es lo que requeria
K**A
Funtioniert
funktioniert
N**N
Super Ware, aber vorher testen ob alte Gasdruckfeder heraus geht 😉
Super Gasdruckfeder, hält top. Für meine 1,90 Meter brauchte ich eine extra lange Feder, daher die 437mm Version. Mehr als ausreichend. Selbst für 2 Meter-Menschen sollte es mehr als genug Hub sein um korrekt und ergonomisch zu sitzen. Verwirrend in der Beschreibung hier ist die 450lbs Tragkraft. Dies entspricht ungefähr 204kg, nicht wie in der Beschreibung 450kg. Gleichzeitig wird aber auf Kolben Klasse 4 verwiesen, die ist eigentlich auf 1000lbs normiert was 450kg entspricht. Im Zweifelsfall würde ich mal von 200kg ausgehen. Die Feder reicht also locker für etwas stämmigere Menschen oder auch um eventuell eine Gasdruckfeder die etwas unterdimensioniert ist zu ersetzen. Falls man mehr als 200kg wiegen sollte würde ich vorher beim Hersteller nachfragen. Jedenfalls kann ich die Gasdruckfeder wärmstens empfehlen. Passt wunderbar in Standard Büro und Gamingstühle. HINWEIS: Ich würde jedem empfehlen unbedingt vorher zu testen ob man die alte Gasdruckfeder rausbekommt (bevor man bestellt). Es gibt zwar zig Tutorials und YouTube Videos die zeigen wie man das macht und wie "einfach" das ist. Bisschen WD40 Spray und dreimal Klopfen und schon ist die alte Feder draußen. Nene... Vor allem wenn man einen älteren, etwas "eingesessenen" Stuhl hat (mein Gaming Stuhl zum Beispiel) ist es alles andere als einfach. Habe über ne Stunde rumgeklopft und Gewalt angewendet Hammer, Rohrzange etc. Da war nix zu wollen. Letztlich hat mir ein Kollege in der Firma (erfahrener Schlosser) die Feder mit exzellentem Werkzeug und Geschick heraus bekommen. Ist wirklich alles andere als einfach, deshalb: Erst ausprobieren!
Y**R
Terettüt Ederek Aldım Ama Kaliteli Ürün Değişimi kolay
Tavsiye Ederim
A**.
Good enough
Good enough but not great
Trustpilot
4 days ago
2 weeks ago