Feature 1Fast Filling: These fast fill hose valves are specifically designed for those who need to fuel their vehicles as quickly as possible, saving precious time. 2Application: Made from lightweight steel, the valves effortlessly replace the flush style mounting caps common on many of today's popular aftermarket fuel cells. 3With Cap and Base: Includes steel base and an aluminum cap, high strength and rustproof, ensuring high durability and longevity even in harsh weather conditions. 445 Degree Angle: The fuel cell filler neck has neck inner diameter of 1.5in, with 45 degree angle, mount the fuel cell using a 12 bolt base. 5Size: The bolt to bolt length of fuel cell filler neck is 120mm / 4.7in; inner diameter is 45mm / 1.8in; outer diameter is 50mm / 2in; bottom to top height is 170mm / 6.7in. Item Type: Fuel Cell Filler Neck Material: Steel and Aluminium Neck Diameter: 1.5in inner diameter Base: Mount the fuel cell using a 12 bolt base Neck Angle: 45 degree Fuel Cell Filter Outer Diameter: Approx. 139.5mm / 5.5in Bolt to Bolt Length: Approx. 120mm / 4.7in Inner Diameter: Approx. 45mm / 1.8in Outer Diameter: Approx. 50mm / 2in Bottom to Top Height: Approx. 170mm / 6.7in Package List 1 x Fuel Cell Filler Neck