BEVCO’s Westmound Series offers a wide contoured seat for long-lasting comfort while the curved backrest provides optimal lumbar support. This non-tilt model features manual back and seat height adjustments for increased comfort during extended sitting durations. A fully adjustable production-style back has a durable scuff resistant back pan to protect the upholstery. The pneumatic height adjustment allows you to easily change your seat height from 17.5" - 22.5". Upholstered vinyl is antibacterial; antifungal and complies with CAL 117. This chair comes with a sturdy 25" diameter black nylon base. Model comes with dual wheel hard floor casters.