€¢ ColorConnex is a patented system that uses color matching of couplers €¢ Plugs among the standard pneumatic interchanges €¢ By using ColorConnex to dedicate line use; you can ensure you never use a lubricated line for a dry line application; preventing cross contamination €¢ Match coupler and plug types €¢ Dedicate hose applications €¢ Type: type D (industrial) €¢ Thread: 1/4 inch FONT €¢ Made from Steel/Aluminum >> ColorConnex is a patented system that uses color matching of couplers. Plugs among the standard pneumatic interchanges. By using ColorConnex to dedicate line use; you can ensure you never use a lubricated line for a dry line application; preventing cross contamination. Match coupler and plug types. Dedicate hose applications. Type: type D (industrial). Thread: 1/4 inch FNPT. Made from Steel/Aluminum."