... ,SPZ,SPA,SPB,SPC, 3V, 5V,8V,14X10, 21X14,etcRaw Edge V-Belt :AV-10, AV-13, AV-17 and AV-22, 9 ... , RHD, RHX, RPP, SL, etc.Rubber Ribbed Belt: PH,PJ,PK,PL,PMFeature of rubber v-beltEnvelope:A special rubber-impregnated fabric that offers resistance ... the body of the belt, thus avoiding friction between the components.Tension rubber:A material composed of special rubber that is responsible for ...