Milton S-218 1/4" M Style Swivel Coupler and Plug Kit - 6 Piece Includes one of each 1/4" female national pipe thread coupler and 1/4" male national pipe thread push button coupler Includes three of each 1/4" male national pipe thread plugs and 1/4" female national pipe thread plug Maximum pressure of 300 pounds per square inch Maximum air flow of 40 standard cubic feet per minute Buna-N seal; Made in USA Includes one of each 1/4" female national pipe thread coupler and 1/4" male national pipe thread push button coupler Includes three of each 1/4" male national pipe thread plugs and 1/4" female national pipe thread plug Maximum pressure of 300 pounds per square inch Maximum air flow of 40 standard cubic feet per minute Buna-N seal