Compatible - with Leaded or Unleaded Gasoline, Diesel Fuel, Blended Fuels, Pure Alcohol & Fuel Additives. Reliable, No Electrical Contacts, Bearings, Rubber Diaphragms or Valves to Wear Out or Fatigue, Easy to Install & Service, Eliminates Vapor Lock - for Constant, Smooth Fuel Delivery on Hot Days & High Altitudes, Pressure Relief - Eliminates Flooding & Assures Satisfactory Restarting on the Hottest Days, Corrosion Resistant - the Plastic Casing Is Designed to Provide Over 100 Hours of Salt Spray Resistance, Self-PrimingPOSI-FLO� Solid State Fuel Pump@ Self-Priming@ Eliminates Vapor LockFitting1/8-27 Internally Threaded