4NN-K4-N4-B1A Switch by Static STATIC "O" RING PRESSURE SWITCH, ADJUSTABLE RANGE+ 20-25 PSI, OVER RANGE= 750 PSI, PROOF= 1000 PSI, SPDT, CAT # 4NN-K4-N4-B1A Reconditioned Inventory Code: D Make an Offer Send to a Friend WHSE: S4A1 Return To Electrical Switches