These Porous Polyethylene vent plugs ranging from 5 to 10 micron are used for iv venting.

These vent plugs are used in conjunction with iv lines to release venus pressure in the Lines.

These pressed into place in a "y" connector near the skin puncture site.

These can also be pressed into an interferance fit to stablize pressure inside of a container.

These can also be purchased with a self sealing polymer That swells upon contact with liquids for applications requiring rapid liquid sealing Protection.