BEVCO's sturdy construction and modern design of the Versa backless stool is ideal for a wide range of applications, including general office, medical, laboratory and factory. 16” diameter blue fabric seat complies with CAL 117. The pneumatic height adjustment allows for stress-free seat height changes from 17" - 22". The stool features a sturdy 25" diameter black nylon base. Model comes with dual wheel hard floor casters.