... ) Reusable,washable 3) Acid-resistant,alkalifast 4) Flexible 10ppi Filter Net detail:1)Material: PU (polyurethane)2)Aperture: from 10ppi ... : >98%4)Shape: square, column etc5)Different hardness and basic color is ok6)Advantage:Excellent filte function, reusable,washable ... , acid-resistant,alkalifast, Flexible,good tensile7)Use: filter dust, air, liquid, equipment filter etc. 10ppi Filter Net