Shijiazhuang Persen Import&Export Co., Ltd., is specailed in classical wrapped V belt. You can't go wrong with power transmission belts from Grainger. Built tough and designed to keep your power transmissions running smoothly, you'll locate the V-belt you need to eliminate slippage and alignment challenges and extend the life of your power unit. That timing belt you've been looking for is also available, made of neoprene for nonslip, quiet and positive performance in synchronous drives XL, L and H. Keep low tension manufacturing and food processing moving with a cut-to-length, urethane, round conveyor belt. The timing belt is located behind a protective shield, making it difficult to inspect, and it does slowly wear out. Vehicle manufacturers typically recommend replacing it every 60,000-105,000 miles, or after six to seven years. The vehicle's manual will include a recommended service schedule listing when the timing belt (and related hardware, like the water pump) should be replaced. If the vehicle's manual isn't available, a mechanic can look up the information, or instructions for a replacement manual will be available on the manufacturer's website.