... Reduce condensation, 2. prevent contamination, 3. Equalize pressure, 4.gas permeable, oleophobic , 5.waterproof , Protective vents Reduce condensation, ... prevent contamination, Equalize pressure, gas permeable, oleophobic , waterproof ,anti –dusBrief introduction of the ... Goods Code"(IMDG CODE) strict requirements. automotive lamp venting bolt(cap)