M-STYLE: Milton M-style, ColorFit M-style, + red competitor 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: Red to Red matching - (M/Industrial) air coupler/plug fittings, easy push to connect. INCLUDES: 3 Male plugs, 2 Female plugs, 1 Male coupler + 1 Female coupler (all 1/4" NPT), Weight: 0.15 pounds, Manufacturer: Milton