BEVCO’s Westmound Series offers a wide contoured seat for long-lasting comfort while the curved backrest provides optimal lumbar support. This articulating tilt model features simultaneous seat and back adjustments to properly position the angle of the chair 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.