... oil and have long life span opti surface classical v- belts are used in the transmission equipment and powerful ... they have advantage as follows:1.opti surface classical v-belts are produced by CR rubber ,which guaranteees long ... .3.the rubber we use is the natural v-belt and have very good quality.4,the wrap ... produced and distributed 5.We can produce opti surface v-belt include C,RB,HL,HM.HO BELT . ...