This kindly of Stainless Steel 316L IP69K Protective Vents Screw-in-Vents M12x1.5 Vent Plug is Good for Railway Equipment Application. Product on the sea. Ourdoor Lighting. Powertrain, Gearbox Telecom. IP69K, IP68, Waterproof and Ventilation Milvent Venting Plug for Outdoor Protection Harsh or changing environmental conditions cause pressure changes that can stress outdoor enclosure seals to failure, allowing contaminants to enter and damage sensitive electronics. Milvent® Protective Vents effectively equalize pressure and reduce condensation in sealed enclosures, while keeping out solid and liquid contaminants. MIV-12SUS316-69K can improve the safety, reliability and service life of outdoor electronic devices.