No instructions...do I just jam it in, as it comes out of the box?

if you have the old one out it should just be a matter of sliding it in where it needs to go reversing the process you did removing the old one and you probably don't want to jam it in. I had issues with mine as the old one didn't want to come out of the bracket on the bottom of the chair

Will this fit in a Razer Iskur chair?

You need to check the measurements that they say. Diameter of the cylinder in the base, and the length of the shaft. I bought the long one it fit but the chair now sits a little higher when lowered and a lot higher when extended. Check the bottom Diameter in the base/wheels

I have a emerge vortex game chair (p/n 58293), will this cylinder fit?

It would have fit my gaming chair but my old cylinder would not come out. I used everything but a torch to get it out. If you have one of the cheap Amazon chairs you might want to look at that first. I changed one in my drafting chair with no problems?

What is the difference between the two sizes? How do I know which one I need?

One size (2.5) provides 2.5" of lift height, while the other (5.5) provides 5.5" of height variance. Which one you'll need depends entirely on how high you'd like/need the chair to be when you sit on it and how much you'd like that height to be adjustable when you work the hydraulics.

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Office Chair Cylinder Replacement,Heavy-Duty Gas Lift Cylinder Fits Most Chairs,Highest End Class 4 Hydraulic Pneumatic Piston, Universal Size

Product ID: 382684647

Details

Brand
HOSALI
Color
Black
Item Weight
2.5 pounds
Material
Stainless
Size
5.5-black

📏5.5-inch adjustable stroke

🔧Universal fit for 99% chairs

⚙️Class 4 heavy-duty piston

¥13191

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Description

⚡ Elevate your workspace comfort with the ultimate chair upgrade!

RISK FREE UPGRADE - Backed by thorough quality checks and responsive after-sales support—replace with confidence and zero hassle.
UNMATCHED DURABILITY - Class 4 gas lift tested for 120,000+ cycles and supports up to 1000 lbs—built to outlast your busiest workdays.
PERFECT FIT EVERY TIME - Universal 50mm base fits 99% of office, executive, and salon chairs—no guesswork, just seamless replacement.
DIY FRIENDLY INSTALLATION - Includes gloves and requires no extra screws—get your chair back to peak performance in under 5 minutes.
EFFORTLESS HEIGHT CONTROL - Smooth 5.5-inch piston stroke lets you customize your chair height quietly and precisely for all-day comfort.

The HOSALI Office Chair Cylinder Replacement is a premium Class 4 hydraulic gas lift piston designed to fit 99% of standard office chairs with a 50mm base. Engineered from solid steel, it supports up to 1000 lbs and endures over 120,000 lift cycles, ensuring long-lasting performance. Featuring a 5.5-inch adjustable stroke for smooth height customization and easy installation without extra tools, it’s the smart, cost-effective solution to revive your sinking office chair with professional-grade reliability.

Specifications

ASIN	B09CYPBZJF
Additional Features	Stackable
Adjustable Seat Height Maximum	16.7 inches
Adjustable Seat Height Minimum	11.22 inches
Age Range Description	Adult
Arm Style	Armless
Assembly Instructions Description	Requires basic assembly using provided tools and optional video guidance
Back Style	no back
Best Sellers Rank	#20,235 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Mechanical Gas Springs
Brand Name	HOSALI
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (2,753)
Fill Material	Foam
Finish Types	Steel
Form Factor	Recliner
Frame Material Type	Alloy Steel
Furniture Base Movement	Glide
Furniture Finish	Steel
Included Components	Gloves, Chair Cylinder
Indoor Outdoor Usage	Indoor
Item Depth	20 inches
Item Weight	2.5 pounds
Leg Style	wheels
Manufacturer	HOSALI
Manufacturer Part Number	occr-black
Material Type	Stainless Steel
Maximum Weight Recommendation	1000 pounds
Model Name	616908911586
Model Number	0c862a9b-760a-4c6c-8439-f578b16a5be7
Number of Items	1
Number of Packs	1
Pattern	Solid
Product Care Instructions	Wipe Clean
Reclining Position Count	1
Recommended Uses For Product	Office
Room Type	Office
Seat Material	Stainless Steel
Set Name	5.5-inch Black
Shape	Cylindrical
Size	5.5-black
Style Name	Modern
Surface Recommendation	Hard Floor
Theme	[INF] Modern
UPC	616908911586
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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¥13191

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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