Aitook AIT-PT199 Gas Fuel Tank Petcock Valve for Honda ATC250SX Fits Honda ATV: 1985 1986 1987 ATC250SX, 1993-2000 TRX300 TRX300FW Replaces Honda Part Number: 16950-HC4-840 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