wrapped v belt classical v-belt uses NR,SBR or CR as main rubber material, polyester cord as framework material. wrapped v belt classical v-belt uses NR,SBR or CR ... according to the standard of GB/T11544 or ISO4184.The belt has the excellence of larger transmission efficiency,small elongation,and ... , 4L, 5L,SPZ, SPA, SPB, SPC,3V, 5V, 8V wrapped v belt classical v-belt