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 assembly 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 brass bushed. Will accept reasonable offer - pick up only in Wisconsin