... , heat 2.good anti-cracking performance, small extending rate Supply Type:1).MXL. XL. L. H. XH. XXH.2).T2.5 ... . T5. T10. T20.3).AT5. AT10. AT20.4).HTD3M. 5M. 8M. 14M. 20M.5 ... , communication equipment, chemical machines, and various precision machine tools and instruments. PU variou open type timing belt STD, T, AT, H, L,HTD