... -SPZ - R-SPA - R-SPB - R-SPC - 3V(9J) Automotive Timing Belt: 3M, 5M, 8M, 14M, 20M, S2M, S3M, S4.5M, S5M ... , 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 ...