Primefit UC1414FB6-B10-P 1/4-Inch 6-Ball Brass Female Universal Coupler Contractor Pack, 10-Piece Premium 6 locking ball design for longer life Solid Brass construction for high corrosion resistance and longer life Nitrile Seals for optimum performance in extreme temperatures Universal Interchange - Adapts to all 3 - Industrial/M-Style, Automotive/Truflate, and ARO style plugs/nipples 1/4-Inch Body Size with 1/4-Inch (NPT) Female threads