Customer built blasted & epoxy coated 4"X4" support 3/4" welded plate on ends wich are machined square and located with dowel pins & 1/2" bolts to long 12' main supports. Measures: 44" X 12' The top surface was also blanchard ground after ***embly for perfect square & flatness. Design is full rotational for ease of welding. Bolt on startionary legs also. Rides on steel swivel castors and screw down stops on end frames. Rotation ends are br*** bushed. Will accept reasonable offer - pick up only in Wisconsin