... :38-45 3.Plain Disc and Notched Disc 4.Diameter:12"-30" 5.Excellent Wear Resistance Our Disc Blades are available in ... and thickness.The main types of blades are Plain Disc and Notched Disc. And the punches of center hole include round ... 2 , 21/4 , 21/244/51/57/63215353.5/4.521/263225603.5/4/5/621/2 , 23/4 , 3 , 31/463 ... /70/76/83235853.5/4/5/631/4 , 31/283/89246103.5/4/5/63 , 33/16 , 31/4 , ...