1. Gr1 porosity Sintered titanium Filter. 2. Grade:T1-T9 . 3. Aperture:4um- ... : 0.6-3.0mm. Gr1 Porosity Sintered Titanium Filter for Medical Use 1. Detailed Information. Item NameTitanium FilterPorosity 28%-50 ... , hydrogen sulfide, acetylene, water vapor, hydrogen, gas, carbon dioxide gas environment. Filtering level Filtering precisionUmMaximum ApertureUmPermeabilitym3/h.m2.kpaThicknessmmCompressive ...