Our industrial quality air hoses have been prefitted with ¼" quick disconnect fittings to easily plug into your air source, our #2229-A or #1148-A Vacuum Generators, our #2215-A or #2216- A Regulator/Filters, any of our Gel Coat Spray Guns and our #171-A Chopper Gun. However, additional fittings are required for the following: Connection to our #1171 Chopper Gun, #120 or #836 Gel Coat Spray Guns require a #2222-A Male Nipple. Connection to our #123 or #126 Gel Coat Touch Up Guns require a #2223-A Female Nipple. Simply snap in the hose and you will be ready to go. This high quality hose is suitable for daily use in a general industrial environment and will not degrade under moderate contact with oils or resins.