... Phosphatiing3. Teeth Number from 9 to 216; O.D. from 10mm to 1000mm; 4. Pilot bore timing pulley MXL, XL,L and H ... ; Pilot bore timing pulley T2.5, T5 ... AT5 and AT10, Pilot bore timing pulley 3M,5M,8M and 14M Taper bore timing pulley L,H, XH, 5M,8M ... and 14M Timing pulley bar 3M,5M,8M,MXL, ...