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MettleAir® carries a wide variety of brass fittings, perfect for air and liquid applications. From small precision miniature pneumatic/fluid fitting solutions to large pipe fittings, MettleAir® has it all. Professionals worldwide choose MettleAir® because of our wide selection of threaded and barbed fittings of all shapes and sizes. Our threaded/barbed fittings are measured and sorted according to industry standard.