Primefit TP1414FS-2 1/4-Inch Automotive Steel Plug Set with 1/4-Inch Female 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 female NPT threads Comes with a 1-year limited warranty