The Milton Industries ColorFit Color Connector System allows users to quickly match compressed air plugs and couplers. ColorFit is available in M-style (red), A-style (green) and T-style (blue). The ColorFit V-style HighFlowPro (purple) provides up to 70 percent more flow than standard couplers, according to the company. All ColorFit plugs and couplers are interchangeable with standard fittings. These connectors can be used to separate lubricated lines from dry lines, or to distinguish between high-pressure and low-pressure lines.