... .6-3.0mm. Gr1 Porosity Sintered Titanium Filter for Medical Use 1. Detailed Information. Item NameTitanium FilterPorosity 28%-50%Aperture4μ-160 ... , acetic acid, oxalic acid, phosphoric acid, 5% hydrochloric acid, molten sodium, hydrogen, nitrogen, hydrogen sulfide, acetylene, water vapor, hydrogen, gas, carbon ...