ColorConnex Coupler & Plug Kit (7 Piece), Automotive Type C, 1/4 in. NPT, Blue - A72457C COLOR MATCHING SYSTEM - Easily connect plugs and couplers with same color DEDICATED LINE USE - Ensures you never use a lubricated line for dry line applications, preventing cross contamination AUTOMOTIVE INTERCHANGE - Type C in all blue color PREMIUM MATERIALS - From the makers of Flexzilla. Made from steel and aircraft aluminum HEAVY DUTY APPLICATIONS - Use on professional jobsites, in automotive shops or at home in the garage