... grade: IP67, 3.long life time, Materil:Breather plug Breather plug:1. Grade: IP67.2.waterproof,but air ... balancing;2, protects the components inside from water, cleanser and other low-surface tension liquid;3 ... , avoids water vapor or harmful battery gas being saved ... outdoor lamps, LED street lamps, under-water lamps,automobile lamps,landscape lamps etc. Breather plug