ColorConnex Coupler & Plug Kit, Industrial Type D, 1/4" NPT, Red, 3-Piece - A73452D
The patented color code system allows for easy, color-to-color matching of couplers and plugs among the standard pneumatic interchanges. It also solves the problem of potential crossing and contaminating of different air lines.<br> <br>By using color to dedicate your different air lines, a lubricated line will never be used for a dry line application as long as your couplers and plugs match.