The Kleinn FIT9-SLIM kit contains the complete set of 1/4" NPT fittings used in the HK9-Slimline Problaster Horn Kit, including the model’s pressure switch, safety valve, drain cock, compression fitting, hex plug, a momentary push button and a vial of thread sealant. This kit provides the necessary fittings and controls to install or maintain that slimline horn system.
Kleinn HK9 Complete Set of Fittings