... :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 :AV ... (h)WedgeangleZ(O,M)8.510640°A11138B141711C192214D273219E323825Narrow V-belt(Unit:mm) TypeUpper Width(b)Height(h)WedgeangleSPZ9 ... .7840°SPA12.710SPB16.313SPC22183V9.585V1613.58V25.523Hexangular Belt(Unit:mm) TypeLength of the beltAA1270-457250-180BB2032 ...