Machine Roller Kit Load Capacity 30 000 lb For Surface Type Any Surface For Movement Type Swivel/Rigid Top Plate Length 5 7/8 in Top Plate Width 5 7/8 in Top Plate Surface Rubber Padded Top Plate Type Swivel with Lock Frame Material Steel Number of Decks 1 Overall Length 58 1/2 in Overall Width 5 7/8 in Overall Height 5 in