BEVCO Industrial Seating has an unconditional 12-year guarantee! (Lifetime on cylinder.) Pneumatic seat height adjustment with fully adjustable back. 2-3/4" thick seat. 360° swivel. Scuff-resistant, glass reinforced plastic base. Black vinyl upholstery. Fire-retardant foam meets California Technical Bulletin #117. 3" vertical, 1-1/2" horizontal back adjustment. Meets or exceeds ANSI/BIFMA standards. Made in USA.NOTE: Models 41746 and 41748 do not include footring.