Economically priced For 36cc to 49cc 2-stroke engines Terminal nut included Buy a spare Standard spark plug used on many 36cc, 43cc, and 49cc scooter engines Typically found on recreational stand up style gas scootersDescription Standard spark plug used on many 36cc, 43cc, and 49cc scooter engines. Typically found on recreational stand up style gas scooters.Includes terminal nut. WARNING California Residents: Proposition 65 Warning