Primefit TP1414MS-2 1/4-Inch Automotive Steel Plug Set with 1/4-Inch Male NPT, 2-Pieces Automotive steel air plug and nipple kit Compatible with automotive, Reflate, "T" and Amble "C" style plugs and couplers Zinc plated steel coupler features high corrosion resistance and long life 1/4-inch body with 1/4-inch male NPT threads Comes with a 1-year limited warranty