Master Massage versatile height adjustable Rolling Swivel Hydraulic Stool in Black for Salon,Beauty, Home and office Generous 3.5" of Higher density permanently MOUDED seat pad will never Change Shape. Five-Point dual swivel caster provides easy movement and extra stability. The hypoallergenic, CFC-free, oil and waterproof upholstery is backed by a 5 year guarantee. 14' large seat pad; Adjustable height of 19" to 25" Weighs only 11lbs but supports 550lbs working weight.