[Size] AN8 [Material] Made of aluminum alloy 6061-T6, anodized black surface. [Sealing] The AN side of the flare is sealed by a 37 degree angle and the NPT thread side is sealed by a 67 degree tapered thread. [Application] Widely used in fuel systems, cooling systems, power steering systems, etc. [Notice] To ensure no leakage at the NPT end, sealant or PTFE tape is strongly recommended. Easy installation and removal with wrench. EVIL ENERGY is our brand, we're a direct and professional manufacturer, one of greatest manufacturer and exporter in tuning parts include intake system, exhaust system, fuel system, cooling system, interior and exterior parts. 1/4 inch NPT to 8an fitting is sealed by a 37 degree angle on the AN end and a 60 degree tapered thread on the NPT threaded end, ensuring a tight seal and easy handling. Note: It is highly recommended to apply sealant or use Teflon tape on the threads before assembly of NPT threads.