1.30 Series Go Kart Torque Converter Driver Pulley Clutch bore 3/4″.Can be used for 10 tooth sprocket or #40/41/420 chain and a 12 tooth sprocket for a #35 chain. 2.Perfect for Go Kart, Minibike and Fun Kart, Lawnmower, 2-6.5 HP Engines (For Motors No More Than 200 cc Only).30 Series Go Kart Torque Converter Driver Pulley Clutch NOT includes set screws and chain also NOT included. 3.Made of high quality Aluminum Alloy,Can effective anti-oxidation and anti-corrosion,Manufactuwith the best finish craft ,Comes with shatterproof sealed ,Beautifully built with smooth surface.C 4.Replaces for: Comet 218353A, 219552A, 219456A, 217610A, and 203814A TAV2 30-75,Replace Manco Comet TAV2;Recommended engine: within 8.0 HP 212CC engines, 3/4″shaft with flat key. 5. 30 Series Go Kart Torque Converter Driver Pulley Clutch will help with more take off power by providing more torque in the low end and higher speeds in top end. NOT Includes Set Screws and Chain. 30 Series — It will help