Also suitable for a broad range of industrial and commercial usesCompression FittingCompression, Fitting, Fittings, Hardware, UnionFuel Line Compression UnionCOMP UNION BRASS 5/16Fuel Line Compression Union – 5/16 In. Steel LineConveniently packaged in diverse piece counts to assist with both small and large projectsAvailable in many different styles, including elbows, union, and teesDorman offers a comprehensive line of Compression Fittings for almost any automotive repair job. All our Compression Fittings are constructed of high-quality materials for long-lasting durability. Not recommended for hydraulic brake systems.A large variety of tube diameters and pipe sizes availableFUEL LINE COMP. UN.