Screw in vents (Screw type vents) are made from overmolding of ePTFEmembrane and plastic particles in the mold. The design of screw can ensure the ventshave exnt sealing performance and not to separate from the housing in theprocess of installation and application. The durability design of screw invents can be applied to all kinds of complicated application environment. IPRO exntprocess technology ensures the best service life of the vents.