Quick Coupler/inserts Aro 3/8' Female   Quick couplings are universal type and can be used on: Orion German Italian and USA fittings      Inserts and Quick couplers operating pressure:     • max pressure of 15 bars Quick Coupler:    • Nickel Plated finish    • Made from BrassInserts:    • Made from steel    Made in Italy  1/4 inch inline BSP thread     The British Standard Pipe (BSP) is a family of standard screw thread types that has been adopted internationally for interconnecting and sealing pipe ends by mating an external (male) with an internal (female) thread and has been adopted as a standard scale used in plumbing fittings.