Models HTD 5M 60T 16mm bore 15 488 3 HTD 5M 20T idler with bearings 6mm bore 3 204 0 HTD 5M 100T 16mm bore 3 206 0 HTD 5M 40T 10mm bore 6 387 1 HTD 5M 20T Pulley 10mm bore 9 780 1