Tengchang Alloy Carburetor For E-TON RXL50 AXL50 TXL Viper ATV Carb Hand Choke 2 Stroke Good at mixing fuel and air,Keep engine running smoothly,Material:Zinc alloy Inner Diameter (intake side):19mm Outer Diameter (intake side):23mm Inner Diameter (air filter side):31mm,Outer Diameter(air filter side):37mm Package Included:1 X Carburetor