Legacy A72456C 5 Piece ColorConnex Type C 1/4 Inch Blue Coupler and Plug Kit (C1,CP1,CP2) - 3 Sets - 15 Pieces Plugs And Coupler Sleeve Are Blue Anodized 6061-T6 Aircraft Aluminum, Steel Coupler Body Type C (Automotive) 300 PSI Max Pressure Anodized Blue 9 - 1/4 Inch MNPT Plugs, 3 - 1/4 Inch FNPT Plugs, 3 - FNPT 1/4 Inch Couplers