The pneumatic adjustment lever will allow you to easily adjust the seat to your desired height. Dual wheel casters provide ease of movement around the space. The small frame of this chair will not take up a lot of space if working in a small area. 5.5'' Height Range Adjustment.17 x 16.5 x 34.8 inches. This item is in the category "eBay Motors\Automotive Tools & Supplies\Shop Equipment & Supplies\Roller Seats & Creepers". The seller is "aknalu" and is located in this country: US. This item can be shipped to United States.