Accommodates desk height to counter height activities. Oversized “tractor” shaped seat with durable polyurethane foam construction. Seat adjusts pneumatically from 27" to 36" high on raised five-star 26" chrome spider base. Adjustable footring and carpet casters. Black. 26w x 27d. Seat: 19w x 14d. Shpg. wt. 23 lbs. Manufacturer’s limited lifetime warranty. Assembly required. Shown with optional Backrest (SAF6661BL), sold separately. Alternative casters are available to meet your specific needs. Casters supplied with this chair are not suitable for all floor types.