Vacuum Switch Range 0 to 28.7 in Hg Contact Form SPDT Port Type 1-Port 1/4-18 in FNPT NEMA Rating 13 4 4X Action Standard Differential 0.8 to 9 in Hg 9013GAW Series Ambient Temp Range -10 Degrees to 185 Degrees F Media Temp Range -14 Degrees to 250 Degrees F