HOOAI New Racing 3 Electrode Spark Plug A7tc for 50cc 110cc 125cc 150cc Atv Scooter Dirt Bike Go Kart (3PC) Direct Replacement! Thread Diameter - 10mm Hex Size - 5/8'' Bolt-on & Go parts! Improved Fuel Efficiency ! Lowers Emission! More Power! Quicker Acceleration ! We are professional auto parts seller! Please feel free to contact us if you are not sure which part to order! Please cross-check before ordering, to make sure this is the right part you need!