It might still work.

It's slightly smaller than the original vacuum switch that was superseded by this model. Fit and works perfectly on our RUUD UGPH-07EAUER furnace. The original vacuum switch acted up once in a while, where flame wouldn't turn on at all then shuts off the inducer blower within a few seconds. I had to tap the the vacuum switch and restart the system to get the furnace back to life. Replaced it together with the flame sensor, which was causing a different issue - "flame timeout within seconds". So far furnace has been working flawless this winter season ever since replacing these parts.