The length range is 11.2 inches to 22.5 inches and the adjustable range: 8 inches." This contradicts itself. Can you clarify the max and min length?

Try looking at the correct picture, you are looking at the measurement of only the shock body which is 11.2. With the shaft fully seated it's 14.5 and fully raised is 22.5, now you've got the 8''. 22.5 - 14.5 = 8 YAAAAAAAAAAAAAAAA.

Does this fit the aeron chair?

You need to find out the diameter of the old cylinder and check against the new. It seems a pretty standard size for office chairs as far as I can see. Getting the old out and the new in can be hard work as these rely on friction and weight to sit in the base as well as connecting to the seat. There are video's on YouTube. Check Aeron cylinder replacement there and see if anyone has posted

Does it come with the tool required to remove the old cylinder?

No, there are no tools included with the cylinder. There are instructions online for removal, the technique that I use primarily involves a 2# hammer. If the cylinder is really stuck into the bracket on the seat bottom, you may need a vise and a punch to hammer out the top of the cylinder. Step by step instructions are too long to detail here - search for a video tutorial on YouTube.

Will it work on this chair to raise it higher than its default? https://www.amazon.com/gp/product/b07s57ccxf hoping so.

Depends on what size cylinder you are replacing. I bought this to replace a 4 inch and it was too high. I bought a 6 inch and it worked fine. No sagging even with my 250 lbs

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8" Chair Hydraulic Cylinder Replacement for Office Chair Gas Lift Cylinder

Product ID: 215223393

Details

Brand
DOZYANT
Color
Black
Material
Alloy Steel
Product Dimensions
2"D x 2"W x
Size
8 inch

💪450 lbs heavy-duty capacity

📏8-inch adjustable stroke

🔄360° smooth noiseless rotation

8" Chair Hydraulic Cylinder Replacement for Office Chair Gas Lift Cylinder

Product ID: 215223393

Details

Brand
DOZYANT
Color
Black
Material
Alloy Steel
Product Dimensions
2"D x 2"W x
Size
8 inch

💪450 lbs heavy-duty capacity

📏8-inch adjustable stroke

🔄360° smooth noiseless rotation

¥18730

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🪑 Elevate your workspace comfort—because your chair deserves an upgrade, not a replacement!

BUILT TO ENDURE - Supports up to 450 lbs with premium Class 4 gas lift technology—engineered for executive-level durability.
UNIVERSAL FIT PRECISION - Designed with a 2-inch outer and 1.1-inch inner diameter to fit most office and executive chairs flawlessly.
WHISPER QUIET OPERATION - Experience smooth, noiseless 360-degree swivel motion that keeps your workspace distraction-free.
DIY FRIENDLY INSTALLATION - No extra screws needed—replace your chair’s gas lift cylinder quickly and easily with included instructions.
EFFORTLESS HEIGHT CONTROL - Adjust your chair height seamlessly with an 8-inch stroke for perfect ergonomic positioning.

This 8-inch hydraulic gas lift cylinder replacement is a heavy-duty, Class 4 office chair component designed to support up to 450 lbs. It features an adjustable stroke from 11.2 to 22.5 inches, fits standard 2-inch outer and 1.1-inch inner diameters, and offers smooth, noiseless 360-degree rotation. Easy to install without additional hardware, it’s the perfect upgrade to restore your chair’s ergonomic function and extend its life.

Specifications

ASIN	B085XK494H
Additional Features	Arm Rest
Age Range Description	Adult
Assembly Instructions Description	Assembly Required, Instructions Included
Back Style	Solid Back
Best Sellers Rank	#19,985 in Office Products ( See Top 100 in Office Products ) #447 in Home Office Desk Chairs #514 in Office Furniture Accessories
Brand Name	DOZYANT
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (7,763)
Fill Material	Foam
Finish Types	Powder Coated
Form Factor	360
Frame Material Type	Alloy Steel
Furniture Base Movement	Swivel
Furniture Finish	Stainless Steel
Included Components	Office Chair Gas Lift Cylinder
Indoor Outdoor Usage	Indoor
Item Depth	8 inches
Item Dimensions	2 x 2 x 11 inches
Item Dimensions D x W x H	2"D x 2"W x 8"H
Item Highlight	Universal Class 4 office chair gas lift cylinder replacement 450 lbs heavy duty piston fits most executive office desk chairs
Leg Style	Straight Leg
Manufacturer	DOZYANT
Manufacturer Part Number	QG-8
Material Type	Alloy Steel
Maximum Weight Recommendation	450 pounds
Model Name	QG-8
Model Number	QG-8
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 Height	22.5 inches
Seat Material	Alloy Steel
Shape	Cylindrical
Size	8 inch
Style Name	Modern
Surface Recommendation	Hard Floor
Unit Count	1 Count

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¥18730

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

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fantastic experience overall. Will recommend to friends and family.

1 month ago

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5 days ago

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