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DOZYANT

DOZYANT 8" Long Stroke Office Chair Gas Lift Cylinder Replacement,Hydraulic Pneumatic Shock Piston Heavy Duty (450 lbs) for Tall Person Universal Size Fits Most Executive Chairs, Highest End Class 4

  • Based on 906 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Sep 25
Order within 17 hours and 29 minutes
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Features

  • 8" STROKE FOR ADJUSTING CHAIR HEIGHT: Minimum length: 11.2 inches; maximum length when fully extended: 22.5 inches; adjustable range: 8 inches
  • HEAVY DUTY Gas lift cylinder that holds great weights - tall center support column of the chair. Holds up to 450 lbs on most office, executive and computer chairs. Highest End Class 4 gas cylinder on market.
  • STANDARD CYLINDER DIAMETER: Outer cylinder: 2 inches, Inner cylinder: 1. 1 inches. Please confirm the measurement before ordering.
  • SMOOTH & NOISELESS: Full 360 degree rotation, smooth and noiseless movements to all directions
  • EASY INSTALLATION : Can be installed easily with no additional screws required.

Description

Description: Frustrated to find that the office chair you sit on for years start sagging or can’t go up and down anymore? But not ready to buy a new one because the rest of the chair is in perfect shape? Why not get to fix it by changing the gas lift cylinder by yourself? How to make sure the gas lift cylinder fits your office chair? Check the outer and inner diameter of your broken gas lift cylinder. This replacement part fits the one with an outer diameter of 2" and inner diameter of 1.1". How to install the gas lift cylinder on your own? 1. Tip the chair onto its side. 2. Use the rubber mallet to tap and remove the base of the chair away from the seat. 3. Use the pipe wrench to clamp tightly onto the top of the cylinder. Twist and then pull up in order to remove the cylinder. 4. Remove the orange cap of the new cylinder. Insert the bottom of the cylinder into the center of the chair base. 5. Carefully lift both the chair base and the chair cylinder into the chair mechanism. The parts will then fasten on their own. Specifications: - Material: Steel - Outer Cylinder Diameter: 2" - Inner Cylinder Diameter: 1.1" - Stroke: 8" - Bearing Capacity: 450 lbs Package Content: - 1 Office Chair Gas Lift Cylinder

Brand: DOZYANT


Back Style: Solid Back


Special Feature: Heavy Duty


Product Care Instructions: Wipe Clean


Unit Count: 1 Count


Brand: DOZYANT


Back Style: Solid Back


Special Feature: Heavy Duty


Product Care Instructions: Wipe Clean


Unit Count: 1 Count


Recommended Uses For Product: Office


Maximum Weight Recommendation: 450 Pounds


Pattern: Solid


Room Type: Office


Age Range (Description): Adult


Included Components: Office Chair Gas Lift Cylinder


Arm Style: Armless


Surface Recommendation: Hard Floor


Furniture base movement: Swivel


Indoor/Outdoor Usage: Indoor


Seat Height: 22.5 Inches


Reclining Position Count: 1


Form Factor: 360


Manufacturer: DOZYANT


Product Dimensions: 2 x 2 x 11 inches


Item Weight: 3.1 pounds


Item model number: QG-8


Is Discontinued By Manufacturer: No


Date First Available: March 6, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Sep 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Finally! Great Product
I have purchased many things from Amazon, but this makes me the happiest. I am a 6’2” video editor, so I spend a lot of time at my desk. I have a great office chair from Amazon, but the issue was that I could not get the desk to chair heights ergonomically correct. The mismatched height resulted in backaches that I had to constantly counter with exercises and pain killers. The choice was to find a lower desk or somehow raise the chair’s height, I chose the latter. This cylinder raised my chair to the height of a stool, a height to high even for me, but it lowered to the exact height I needed, where my thighs are parallel to the ground and my feet properly aligned with the floor. If you are on the fence and have a similar issue, just buy it, you will not regret it. ... show more
Reviewed in the United States on July 11, 2025 by Trevor
    • Updated review: May need to adjust your chair's adjustment lever tolerance
Updated review: I ordered a replacement from another brand. Upon installation, I noticed the exact same issue: When sitting down, the seat would slowly drop. It occurred to me that the button on the top of the cylinder that activates the height adjustment was ever so slightly depressed. The cylinder had gone into a Herman Miller Classic Aeron chair, which is cable driven and has a lever that activates the push button on the cylinder. The lever has an adjustment screw which needed to be backed out slightly. Once I adjusted the screw in combination with the new cylinder, it worked perfectly. Apologies for blaming this on the product. I'm sure if I had adjusted this screw properly, this cylinder would have worked just fine as well. Original review: Noticed today, 52 days after I purchased it, that the chair no longer stays at the set height when sitting down. I bought this for two reasons: the extra-long height, and the additional weight capacity. I'm 6'5" and 300lbs, so I need both to sit without hip and knee joint pain. I expected the 450lb capacity would be plenty, but here I am, sitting low once again, with knee and hip pain. Can't return since it's past the 30 day return window. I feel scammed. ... show more
Reviewed in the United States on November 10, 2023 by John H.
    • Makes my Aeron a usable height, installation can be tricky if you have an old chair
This is a good cylinder and I love the height it adds. I viewed the installation instructions and watched some videos, but I did not have an easy time installing it because my chair was old, grimey and dusty. (The label on bottom said 2003) Tips if your chair is old like mine. 1. To get the existing cylinder out of the chair, you may need to whack it HARD. I used a 5lb sledge and a block of 2x4. Even then, it took SEVERAL hard whacks, putting all sorts of dents in the wood block. 2. Use an adjustable pipe wrench to unscrew the cylinder. The teeth on mine were leaving marks on old cylinder and it wouldn't budge. I eventually applied WD-40 at the top and that loosened it up enough to come off. There was a bunch of rust inside. 3. Once you install the new cylinder, you will have to pop off the plastic cover under the chair and adjust the set screw so it doesn't sag. After I did this, it worked perfectly. ... show more
Reviewed in the United States on December 27, 2024 by Andrew Purcell
    • Perfect fit! Easy installation.
Perfect fit!!! Easy to install this replacement.
Reviewed in the United States on August 5, 2025 by JOHN BENNER
    • It's too tall for a regular desk chair.
If you want to take a regular desk-height chair and turn it into a counter-height chair then its perfect but it is too tall for a desk-height chair. I was hoping that I could use it all the way down for sitting at my desk, then raise it up when I raised my desk, but it is too tall when all the way down. My feet don't touch the floor. I am 5' 11" so I am not used to my feet not touching the floor when I am seated. Removing the old one was a chore. I put some anti-seize into the base and mechanism when I installed the new one so that the next time it won't be so hard. I expect that the cylinders are the most likely thing to break on a modern office chair so I figure I'll replace the cylinder every few years. I ordered another one that is a little smaller and think I will return this one when it arrives tomorrow. I might use it on a padded shop stool that I have which would be better if it had a longer stroke cylinder but we'll see. ... show more
Reviewed in the United States on May 23, 2025 by Phillip Blanton
    • Does not fit!!!!!
This says it will fit in most chairs. Also says it's 2 inchs. Doesn't fit. Won't come down to where you can actually sit in the chair without your feet leaving the floor. Absolutely ridiculous that I have to return this and now have no chair to use. Furious..
Reviewed in the United States on August 9, 2025 by Lee F.
    • High Office Chair Cylinder
Impressed by it's length! Works great! DM ⭐⭐⭐⭐⭐
Reviewed in the United States on May 22, 2025 by DM
    • Great height extension
Great product that allowed me to make my chair higher than the standard height.
Reviewed in the United States on July 19, 2025 by Jamie

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