T-STYLE: Milton T-style, ColorFit T-style, + blue competitor T couplers/plugs are all compatible! DURABLE: Scratch-resistant steel design in an anodized coating for optimal wear vs. aluminum sleeves EASY MATCH: Use color to distinguish between air lines (e.g. high pressure vs. low pressure) COLOR: Blue to Blue matching - (T) aircoupler/plug fittings, easy push to connect. INCLUDES: 6 Male plugs, 4 Female plugs, 2 Male couplers, + 2 Female couplers (all 1/4" NPT)