Aitook AIT-PT191 Gas Fuel Tank Petcock Valve of Honda Rebel 250 CMX250 Petcock Valve Fits Honda: 1982 1883 CM250C, 1985 1986 CMX250C, 1986 1987 CMX250CD Replaces Honda part number: 16950-KR3-981 / 16950-KB4-005 Petcock thread size = M18x1(18x1mm) / 24mm hex nut / Petcock positions: ON-RES-OFF Package Includes: Petcock switch, Fuel filter pipe with screens, O-ring seal Please refer images we provided for measurements, Read product details for more information