Designed for fabrication and transportation of products to the job site. (we recommend our shop carts for shop and warehouse use). Hot dip galvanized finish. CK-4 Optional caster kit (4) 8" roller bearing wheels, (2) swivel casters with brakes and (2) ridged. Quick release mounting pins and caster stems change rack from mobile to stationary. Fork lift hoops mounted on sides and ends. Bottom pads and uprights have riveted rubber strips. 4,000 lb. total capacity (2,000 lbs. per side) Length 98.5, Width 44", Overall Height 66", Height w/casters 81", Load height 56"