Description: Fuel oil tank fitting max pressure is 4000psi/275bar, working temperature range -65 - 252 degrees FahrenheitFuel fitting adapter includes a locking nut and two oil resistant washers, made of high grade lightweight aluminum material for strong strength.AN flare cover will block off fuel hose line prevent dirt and debris from entering the external threaded hose fittings and adapters. Fuel tank fittings are compatible with gasoline and alcohol based fuels,black anodized for great appearance and anti-corrosion.Precise thread engagement and a 37sealing angle for a positive seal at maximum operating pressures.Easy to install. Use AN adjustable wrench to screw the accessories into the mating part until the pre-formed package is fully inserted into the mating packaging seat. Specification: AN6 Size: 3.9x2.4cm/1.54x0.94inch Weight: 18.2gAN8 Size: 4.2x3cm/1.65x1.18inch Weight: 30.7AN10 Size: 4.7x3.2cm/1.85x1.26inch Weight: 38gMaterial: Aluminum AlloyColor: Black Package Includes: 1 Piece Fuel Cell Bulkhead Fittings1 Piece Hex Nut1 Piece Washer(2 Pack) Note: 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful on-line shopping!