Hydraulic Adjustable Stool Facial Salon Massage Spa Dental Swivel Rolling Chair Plastic Base, 250lbs Capacity. 360 Degree Pivoting Seat. Durable PVC Leather best for Salon Using. High density sponge, not produce distortion. 3 1/4''Thick Foam. Large 14'' Diameter Round Seat Surface. Hydraulic Height from 16 1/2'' to 20 1/4''. 20'' Diameter base Dimension. 8 1/2'' L 5-leg Base.