Thread The Vibrant Fuel Pump Check Valve is a high-quality, durable component designed to provide a reliable connection between a -6AN male flare fitting and a 12mm x 1.5 metric thread. It is made from high-grade aluminum and features a black anodized finish for corrosion resistance and durability. This check valve helps to ensure that fuel is properly flowing through the fuel system, and prevents backflow from the fuel pump, allowing for optimal performance.