Gates Polychain Final Drive Belts 1in. - 14mm 136 T PC-136-1 Precision ground Neoprene rubber backing, which rejects abrasive wear and allows less vibration Tooth profile does not allow air to be trapped between the belt and the pulley Provides for a quieter and smoother performance Made in the USA Note: 1in. and 1-1/8in. belts are designed for show and not intended to replace factory O.E.M.