18" to 28" Long Adjustable Gas Lift Cylinder Tube for Bar Stool Drafting Chair Replacement Parts,Heavy Duty Hydraulic Pneumatic Cylinder Shock Piston ✓ Free 60 Day Returns ✓ Free Express Shipping Description: 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 stools.We still recommend that you measure your original cylinder size before purchasing.）2. How to choose the size?6.5 "stroke lift cylinder is a common size for most chairs and stools. Please refer to the size in the picture. If you want to replace the stroke lift cylinder with the same height, this is usually the most appropriate.10 "stroke lift cylinder, this is usually used for bar stool chair and drafting stool for replacement. 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.Weight capacity and WarrantyWeight capacity: 450 LBSPlease contact us through Amazon "contact seller".You will get a free replacement for any non- human quality problem within 5 years. Features: Study & Heavy Duty: Certified by SGS test (USA) & Higher Standard LGA test (GER), use of high quality materials and thickened outer steel, this gas lift cylinder is of really high quality and durability, weight capacity: 450 lbs.Universal size: 10 stroke cylinder piston tube,the lowest height is 17.7", the highest height is 27.7", which means this hydraulic lift has a height range of 10 inches.Longer service life:These high standard office chair cylinder are more reliable and you get a free replacement for any non-human quality problem within 5 years.Chair replacement parts: Suitable for bar stool ,drafting chair,high stool,smooth rise and fall, and supports 360 degrees of rotation.Easy to Install: Usually you will need to use a hammer to remove the old gas lift cylinder from the chair base and replace it with a new one. (We recommend that you search for "gas lift replacement" on YouTube) Product Details: Package Dimensions: 20.5 x 2.6 x 2.6 inchesItem Weight: 3.54 poundsManufacturer: AinilailyItem model number: bar stool gas lift cylinderDate First Available: January 11, 2021