MC^MP KUNFU 20mm Carb Carburetor of with Hand Choke for 110cc ATV Dirt Bike Go Kart Pit Bike 4 Wheeler Quad KUNFU 20mm Carburetor with Hand Choke The material: total aluminium fits for 110cc Horizontal Engine The outside diameter connected with air filter: 34mm. The inside diameter of carburetor: 20mm.