Our product:Long provider life, high energy and toughness, capable of operating for long periods of timeLow elongation and higher put on resistanceWith a comfortable body and a more in-depth match to the wheel groove, it has a wide range of applicationsProduct selection of nice uncooked materials, elimination of faulty products, oil and warmth resistance, anti-static, and effective transmission performanceProduct code description:La=outer circumference Lp, Le=nodal length Li=inner circumference