Timing belt: Cr materials 1.Life span--80000kilometers to 120000kilometers 2.Better capability of anti high and low temperature 3.Better capability of anti age-especially gifted ozone-resistant properties 4.Good chemical stability -the chemical resistance of the general erosion 5. Fire and water resisitance Hnbr materials: 1. Life span--120000 to 150000kilometers 2.Excellent oil resistance--oil resistance with very low inlfation and higher oil resistance 3.Better durability-dynamic performance better than chloroprene rubber belt, the first choice in the luxurious car drive belt ; 4. Gifted wear property-more wearable than small chloroprene rubber belt to reduce the noise , effectively extend the service life of the belt Strong packing with cartons