Open Timing Belt 1) XL,L,H,DH,XH, 2M,3M,5M,8M,10M,14M,DHTD8M,DSTD8M, 2) AT5,AT10,AT20,DAT10,ATP10 3) T5,TT5,T10,DT10 ... ,T20 Polyurethane timing belts specifications:1) XL,L,H,DH ... ,XH2) 2M,3M,5M,8M,10M,14M,DHTD8M,DSTD8M3) AT5,AT10,AT20,DAT104) T5,TT5,T10,DT10 ...