This is a BRAND NEW Rheem/Weather King/Corsaire/RUUD Gas Furnace Air Pressure Switch. The Rheem/WKing/Corsaire/RUUD Part # is 42-101233-81 (also replaces 42-101233-01 and several other #s) and It's rated at 0.35" W/C. It has two wiring harnesses and one hose port.
Partial List of Rheem/Ruud/Weather King/Corsaire Furnaces that use this Air Pressure Switch:
RGPH-15EARJR UGPH-15EARJR WGPH-15EARJR RGPH15EARJR UGPH15EARJR WGPH15EARJR MGPH-12EARJR MGPH12EARJR RGPH-12EARJR UGPH-12EARJR WGPH-12EARJR RGPH12EARJR UGPH12EARJR WGPH12EARJR RGPH-15EARJR UGPH-15EARJR WGPH-15EARJR RGPH15EARJR UGPH15EARJR WGPH15EARJR UGPH Series RGPH-12EARJR RGPH-15EARJR UGPH-12EARJR