Specification1.Pulley Model:S5M-28T2.Teeth Shape:Flat-top Arc Teeth3.Pulley Shape: AF Shape4.Material:Aluminium Alloy5.Teeth Pitch:5 mm6.Surface Treatment: Matte Anode7.Bore Size: 5/6/6.35/8/10/12 mm9.Belt Width:10/15/20/25 mm10.Fit For Belt Model:S5M Timing Belt