Machine Roller Kit, Load Capacity 16,000 lb, For Surface Type Any Surface, For Movement Type Turn/Swivel, Top Plate Length 4 in, Top Plate Width 2 1/2 in, Top Plate Surface Rubber Padded, Top Plate Type Swivel, Frame Material Steel, Number of Decks 1, Overall Length 6 1/2 in, Overall Width 4 1/8 in, Overall Height 4 in