Air fittings, couplers, hoses and adapters can be found under the Milton brand. Milton is a leader in this industry, manufacturing virtually every size and shape coupler and gauge imaginable. They offer most of their items in brass or steel, bulk or carded, and as aforementioned, just about any size you could ever need. This makes for an excellent one stop shop for all your air hose and compressor needs. Milton also offers excellent value packs where you can get all the popular sizes at an excellent price.