Vent Filter products of Sanga Frontech Co., Ltd. are laminating products of ePTFE Membrane and supports (PET or PP nonwoven fabric) with hundreds of millions of nano-sized pores per square centimeter. They have excellent air permeability. By maintaining the pressure equilibrium inside and outside the parts using the case, they prevent mechanical damages such as sealing and the inflow of contaminants from the outside. It is possible to prevent internal condensation. Various types of products can be supplied according to usage.