HTD 5M Timing Belt Pulley Idler Pulley 12T-50T, Bore 3-25mm, for 20mm CNC Belt
(Suitable for Timing Belt Model: HTD 5M Timing Belt （Belt tooth shape: Arc; Pitch: 5mm). Slot Width: 21mm(Suitable for Timing Belt Width：20mm). Pulley Style：With Teeth or Without Teeth(Smooth). Bore Diamater：3mm-25mm.