Hardware kit contains all the specialty parts and hardware needed to build one dump truck: 2" single wheels (2), 2" dual wheels (4), oil drums (fuel tanks) (2), 11/32 x 1-5/8" axle pegs (2), 11/32 x 2-3/8" axle pegs (4), 12" 10-32 threaded rod (1), 3/8" washers (6), 10-32 acorn nuts (8).