Primefit IC1414MB6 1/4-Inch Industrial 6-Ball Brass Coupler with 1/4-Inch Male NPT Industrial 6-ball brass coupler Compatible with industrial, "M", "D" and "I/M" style plugs and couplers Brass construction for high corrosion resistance, longer life and smoother operation 1/4-inch body with 1/4-inch male NPT threads Comes with a 1-year limited warranty