Aitook AIT-PT1916 Fuel Tank Switch Valve Petcock Honda TRX 300 TRX300 FourTrax Fourtrax Fits Honda Models: 1985-1987 TRX250 Fourtrax, 1988-1992 TRX300FW Fourtrax, 1988-1992 TRX300 Fourtrax, 1993--2008 XR650L Dual Sport Replaces Honda part number: 16950-MY6-791, 16950-MY6-791, 16950-HA8-005, 16950-HC4-670, 16950-MY6-670 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