This heavy-duty hardwood dolly supports up to 1000-lbs. on a one-piece poplar deck and rolls on four 3in. polyolefin double ball raceway swivel casters. U.S.A. Rounded corners reduce collision damage Convenient hand grip slot 1000-Lb. Capacity 30in.L x 18in.W x 4 9/16in.H 3in.dia. wheels