Big Chain Wheel We can supply all different types of wheels with good ... according to customer's design. ASA SPROCKETS PITCH 1/2" X 5/16 ASA 40 SPROCKETSSIMPLEXDUPLEXTRIPLEXZDeDpDmD1ADmD2ADmD3A1047.6641.1261025 1151.6445.08291025 ... have 60,80,100,120,160,200 types. Big Chain Wheel