Actual Picture Performance: Metal Dual Vent is designed to improve double check valve have risk to let the dust particulates entry enclosure during negative pressure happen under a tough environment. The structure inside combines a porous filter under double check valve and it could help to prevent dust particulates entry enclosure and meet IP68,IP69K. Below is the detail informations: ->Block ingress of wide range of contaminants,from rain and insects to dirt,dust,sand and other,particulates, ->IP 66,IP67,IP68,IP69K protection class and -40°C to +150°C ->operating temp.range.Best to use under the tough environment. ->No direction installation requirement. Application: Gearbox,Mining lamp,EV Battery Pack,Senser,Motor, Telecom