Vacuum Switch Range 5 to 25 in Hg Contact Form DPST Port Type 2-Port 1/4-18 in MNPT NEMA Rating 1 Action Standard Differential 5 to 10 in Hg 9013GVG Series Ambient Temp Range -10 Degrees to 185 Degrees F Media Temp Range -14 Degrees to 250 Degrees F Features 1/4 in male pipe thread on pressure connection