... ID 40 * Thickness 2.0 mm * Teeth 80 ( PIN hole: 2/8/55, 4/12/64 )Material: HSS M35 ... as below: 1)Detailed size or Dimension:Outer Diameter,Hole Diameter,Teeth Number or Without Teeth; 2) Surface treatment ... coated) Tooth form: A/AW/B/BW/HZ Diameter: 200mm; 225mm,275mm,300mm,315mm,325mm,350mm,370mm ... 3.0mm Bore diameter: 25.4mm;32mm;38mm;40mm;50mm or customer bore size. Pin hole size: Bore 32mm ...