www.milvent.com [email protected] Venting for Energy Storeage MIV SERIESMIV-4015EXB for Battery Pack ->Maintain high airflow in large EV Battery Pack . ->Equalize pressure and reduce condensation by allowing air to flow freely into and out of sealed large enclosures. ->PA6 Material and UL94V0 Grade. ->IP67,IP68,IP69K and -40 * C to +125 * C operating temp.range.Best to use under the tough environment. ->Can Open and pop-up the cover to release higher airflow when heating up under an abnormal status. -installing on the side/Flat face of enclosures is effective for outdoor use. Pop up it can recovery when pressure release Technical Data How it works(video)- https://www.milvent.eom/m40-Battery-Pack-Vents.html# pp=2 331