Naxos-Union 19-1/2 in. x 138 in. Roll Grinder Model W500/3500, S/N 35869, Work Head with 33 HP DC Variable Speed Drive, Manually Actuated Tailstock, Grinding Head with 10 HP Motor, 20 in. Dia. x 3 in. Wide Grinding Wheel, Over-the-Wheel Dresser, Plunge Cycle, Paper Filter Coolant Filtration System (#RG-4)