Model SR-WM is a wall mounted unit with dual 60" high supports. They come with three (3) 18" arms and four (4) 15" arms. The 18" arms have 9" height clearance and the 15" arms have 7-1/4" clearance. Uniform load capacity is 1,000 pounds. The bright zinc plating provides a long term, attractive appearance. Shipped knocked down with convenient and quick assembly. Model SR-SS is a self-supporting 66" high A-frame with 7 storage levels. Arms extend up to 12" beyond A-frame. Base dimensions are 60" by 36". Shipped knocked down with convenient and quick assembly. Bright zinc plated finish. Model SR-V is a floor-mounted vertical material rack. Features three storage bays. Shipped knocked down with convenient and quick assembly. Bright zinc plated finish.