Certified by SGS Test(USA)&Higher Standard LGA Test&(GER),unlike cheap leaky and sinking gas lift cylinder,these high standard lift cylinder are more reliable and heavy duty.Questions&Answer1. Does this lift cylinder fit my chair?In most cases, this Gas Cylinder Tube is applicable to most executive chairs and still recommend that you measure your original cylinder size before purchasing.)2. How to choose the size?8 " stroke lift cylinder is 2-4 inches higher than the conventional. If you want a higher office chair gas lift cylinder,we highly recommend this size.In most cases,when you finish assembling the chair, the height of the chair is about 20-28 inches.3. How to replace the old gas lift cylinderUsually you may need to use a hammer to take out the old gas lift cylinder from chair base and replace it with a new one. (We suggest you search for "gas lift replacement"on youtube for instructions)4.LengthFully compressed is: 14.3", and the height fully extended is: 22.3". This means this hydraulic pneumatic tube has an adjustable height range of 8 inches, smooth rise and fall, and supports 360 degrees of rotation.5.Weight capacity and WarrantyWeight capacity: 450 LBS5 years warranty.Please contact us through"contact seller".You will get a free replacement for any non-human quality problem within 5 years.
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