Field Controls 46273100 Air Pressure Switch For CAS-3, CAS-4 and CK Control Kits Dated After 6/1/98 Switch Specifications Manufacturer Cleveland Controls Model Number RFS-4100-021 300 VA Pilot Duty @ 124 to 27 VAC 15A Non Inductive To 277 VAC 50/60Hz Maximum Pressure 1/2 PSI 0.15" to 5.0" W.C. This Switch Is Used On: CK-43, CK-43F, CK-61, CK-62, CK-63 Control Kits CAS-3, CAS-4 Power Venters Replaces Field Controls 46083000