E R Wagner/Napa Auto Parts 6 inch 700 pound tool box caster with total lock brake Napa # TSS AC711 These came out of a closed auto parts store. They were loose parts-not in a box or package but a plastic bag. They are new casters but have some light scratches and scuffing Napa shows they fit tool box #531812 Total height-7 1/2 inches Wheel diameter-6 inches Wheel width-2 inches Mounting plate- 4 x 4 1/2 inches Polypropylene tire 700 pound capacity Free Priority shipping