... certificate.Plain v-belt: FM(9.5),Z,O,A,B,C,D,E,F,SPZ,SPA,SPB,SPC, 3V, ... - BJ - CJ - DJ , 5V(15J) - 8V(25J) - R-SPZ - R-SPA - R-SPB - R-SPC - 3V(9J) Automotive Timing Belt: 3M, 5M, 8M ... S5M, S8M, S14M, RP2M, RP3M, RP5M, RP8M, RP14M, etc. R(MR), Y(MY), ZBS, YU, RU, ZA, FS, ZD, ZR ... cords (polyester) that guarantee total power transmission with a very low elongation rate and high resistance to fatigue. ...