This counter height mesh back adjustable drafting chair from Office Star features Air Grid screen mesh upholstery on the backrest for maximum support and ventilation throughout the workdayFeatures: Built in lumbar support Thick foam padded seat cushion upholstered in breathable mesh fabric Pneumatic seat height adjustment 360 degree swivel Height adjustable chrome finish footring Heavy duty chrome finish arched base with dual wheel carpet casters Optional adjustable arms available for this model This drafting stool meets or exceeds ANSI/BIFMA standards Dimensions: Overall: 51"H x 21.25"W x 25.5"DSeat Size: 20"W x 19.75"D x 3.5"ThickBack Size: 19.75"W x 17.75"HSeat Height: 27.5" - 32.5"HWeight: 37 lbs.Limited lifetime warranty from Office StarThis chair normally ships within 2-3 business days from our CA or NJ warehouse.