Uprights and beams are made of heavy gauge steel with a corrosion resistant powder coated finish. Supplied with rubber feet to protect the floor. Easy interlocking assembly, with just two nuts and bolts, joining one upright frame to the next. Three ways of assembling: one tall rack with 4 shelves, two lower racks, or three sections arranged in a workbench. Additional combinations are possible if you have 2 or more units Each adjustable 430mm deep shelf can take up to 455kg UDL (uniformly distributed load), the rack being fixed to the wall. Images are for illustration purposes only