... available. 5. Best quality and competitive price. Gr2 Titanium Micropore Cartridge Filter 1. Detailed Information. Item NameTitanium FilterPorosity 28%-50%Aperture4 ... sodium, hydrogen, nitrogen, hydrogen sulfide, acetylene, water vapor, hydrogen, gas, carbon dioxide gas environment. Filtering level Filtering precisionUmMaximum ApertureUmPermeabilitym3/h.m2.kpaThicknessmmCompressive ...