... goods passed ISO9001:2000 certificate.Plain v-belt: FM(9.5),Z,O,A,B,C,D,E,F,SPZ ... ,SPA,SPB,SPC, 3V, 5V,8V,14X10, 21X14,etcRaw Edge V-Belt ... Belt: PH,PJ,PK,PL,PMFeature of rubber v-beltEnvelope:A special rubber-impregnated fabric that offers resistance to abrasion ... cords (polyester) that guarantee total power transmission with a very low elongation rate and high resistance to fatigue. ...