The Kleinn FIT12 complete fittings kit provides the full set of 1/4" NPT fittings used in HK1 or HK2 Problaster Horn Kits, including pressure switch, safety valve, drain cock, elbow compression fitting, a momentary push button and a vial of thread sealant. It consolidates all line fittings and controls needed to rebuild or service those specific horn kits.
Kleinn HK1 Complete Set of Fittings