... grade: IP67, 3.long life time, Materil: ePTFE street light vents street light vents:1. Grade: IP67.2.waterproof,but air ... the pressure inside&outside.4. material:ePTFE street light vents Main advantages of ePTFE street light vents:1, reduces the pressure ... time. ePTFE street light vents is widely used in: LED outdoor lamps, LED street lamps, under-water lamps,automobile lamps,landscape lamps etc.