Lathe Cut Washers and Gaskets, Sweeper Belts, Tight Tolerance Tubing Products sweeper belts, lathe cut seals, lathe cut gaskets, lathe cut washers, lathe cut rubber seals, lathe cut rubber gaskets, lathe cut rubber washers, gaskets, oem sweeper belts Grand River Rubber & Plastics Co. is your premiere source for custom lathe cut products. We manufacture to your specifications in a wide range of polymer types and durometers, both straight and bevel cut.