These fittings are CNC-machined from an aircraft grade 6061-T651 billet aluminum alloy, and then anodized with a Type II bright dip black finish; engineered to fit most manufactures Nylon and Stainless Steel high pressure hose precisely. FaSSters line of AN 37°aluminum hose ends features a double O-ring, triple seal design to ensure a leak-free connection for many fluid applications including fuel, oil, alcohol, E85, diesel, etc. All fittings provide consistent alignment with 360° swivel ends, and mandrel bends offer improved flow characteristics. Sold 1/pkg.