Premium 23 die cast aluminum base with satin finish top 5-leg design for greater stability Full size diameter top and base for comfort and stability 4 thick seat for extra comfort Black hooded dual wheel nylon casters Pneumatic height adjustment All seats have 3/4 thick solid plywood base Lever controls height Knock-down design saves on shipping Easy no-tools required assembly Premium stain-resistant woven knit-backed vinyl upholstery 250 lbs. load capacity under normal use
