Machine Roller Kit Load Capacity 6 000 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 21 in Overall Width 3 5/8 in Overall Height 3 1/2 in