The Labconco Variable Height Bench has four adjustable heights, provides auxiliary bench space and transports equipment from lab to lab. Heights range from 29.63" to 37.38" using steel pins with nuts inserted in vertical frame members. Supports loads up to 540 pounds. Additional features: 5" diameter, non-marking polyurethane casters with toe locks; ready-to-roll, full factory assembly; durable glacier white, epoxy-coated 18 gauge welded tubular steel frame; lifetime guarantee.