This backless medical stool from Boss Office Products features durable easy to clean vinyl upholstery for years of comfortable office use. Other features of this stool include thick foam seat padding, lever controlled pneumatic seat height adjustment with a 6" vertical height range, 360 degree swivel and an attractive chrome finish base with dual wheel casters for easy mobility. Optional matching vinyl, padded backrest available for a minimal charge. Meets or exceeds all ANSI/BIFMA standards. Dimensions: Seat Size: 16"Diameter. Seat Height Adjustment: 20.5" - 26.5"H. Overall: 20.5" - 26.5"H x 25"W x 25"D. Warranted by Boss Office Products. This stool normally ships in 2-3 business days.