... , 2.waterproof grade: IP67, 3.long life time, Materil:ePTFE LED street light vents:1. Grade: IP67.2.waterproof,but air ... device case by the fast pressure balancing;2, protects the components inside from water, cleanser and other low-surface tension liquid ... installation ,long working time. ePTFE LED street light vents is widely used in: LED outdoor lamps, LED street lamps, under-water lamps,automobile ...