7 Machine parts, namely, drive rollers, idler rollers, yoke rollers, wheels, bearings, shafts, cam followers, belts, tubing, clamps, and grippers; machine parts, namely, drive rollers, idler rollers, yoke rollers, wheels, bearings, shafts, cam followers, belts, tubing, clamps, and grippers, all being formed at least in part of, or coated with, polyurethane