Heavy duty and static free, high‐density polypropylene material with a light grain surface, injection molded into a one‐piece shell unit with 17 heavy duty reinforcing structural ribs. The ribbing provides the one of the most durable shells available while giving lateral movement and flexibility. The shell is ergonomically designed with waterfall front and lumbar support which provides for proper posture and comfort. The shell is attached to the frame with steel rivets underneath the seat, which offers no exposed hardware on the surface.
Legs formed of 1 1/8", 13‐gauge HSLA steel. Each leg set (front and back) made of one tube running side to side of the seat joined by two 14 gauge steel brackets. Four bumpers are riveted on underside of frame to prevent scratching on work surface when stacked.