... -cracking performance, small extending rate Supply Type:1).MXL. XL. L. H. XH. XXH.2).T2.5. T5. T10. T20.3 ... small extending rate5) good surface without crack6) competitive price7) widely used in automobiles, and machinery equipment for auto, sewing, spinning, food ... . PU variou open type timing belt STD, T, AT, H, L,HTD