(Model: HTD 5M. Suitable for Timing Belt Model: HTD 5M Timing Belt （Belt tooth shape: Arc). Bore: Keyway bore. Type: 5M Timing Belt Pulley. Slot width: 21mm(Suitable for Timing Belt Width:20mm). --The synchronous wheel is made of aluminum alloy, the retaining edge is galvanized, the surface is not treated.
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