This kit is made of high quality iron and aluminum, which is sturdy and durable. It fits all engines with a 3/4 inch straight crankshaft and it??s suitable for Go Karts 30 series. Made of high quality iron and aluminum, sturdy and durable. Length: 70.5cm / 27.76″, Outside circumference: 27 23/64″, Width is 3/4″.??1.9cm / 0.75″??, Center to Center of driver and driven: 6-15/16 to 7″ 1x 12 Tooth Sprocket for #35 chain;1x 10 Tooth Sprocket for #420 /#40 /#41 chain 3/4″ Torque Converter KitMade of high quality iron and aluminum, which is sturdy and durable Suitable for Go Karts 30 SeriesFits Predator (Harbor Freight)Fits all engines with a 3/4″ Straight Crankshaft This kit comes with a 3/4″ Driver Pulley and a 5/8″ Bore Driven Pulley 6″ DiameterReplaces CometAlso Fits Manco Go Karts 30 Series Toruqe