entry of contaminants like dirt and debris; Uses: communication boxes, gearboxes, electronic products; High-performances venting eliminates the need for extra-hardened components, saving weight and costs; The threaded hole does not need a nut to fix it, screw it in directly; Use sealing rings, good breathable

What's in the box
1 x 5 6 12 16 M20 Metal Air Vent Valves Stainless Steel Led Lamp Vent Plug