... Equalize pressure, 4.gas permeable, oleophobic , 5.waterproof , Protective vents Reduce condensation, prevent contamination, Equalize pressure, gas permeable, ... waterproof ,anti –dusBrief introduction of the Protective Snap-In VentsProtective vents are placed over ports in these devices ... reliability and extended product life.Pan Asia microvent protective vents IP rate is divided into 4 rates ,IP65 ...