J Specifications (Dimensions in inches, weight in pounds) Width, overall 48 Length, overall 72 Length, overall (arms extended) - Height, overall 73 Load capacity 4000 Net weight 160 Shipping weight 170 List Price (Call for dealer information) Pricing Material: Upperframe, 1 1/4" IPS aluminum alloy pipe. Steel underframe. toe plates, 4" wide steel. Wheels: Comes standard with 6" polyurethane wheels, 4" swivels, 2 with swivel locks.