... from 40-120 kg/m3 is available, is suitable for mattress, pillow, insole, case, mat etc.4)MDI FOAM: such as ... cutting equipment, can product various shape of foams. 2.40ppi Air Filter Foam detail:1)Material: PU (polyurethane)2)Aperture: from ... ,washable, acid-resistant,alkalifast, Flexible,good tensile7)Use: filter dust, air, liquid, equipment filter etc. 40ppi Air Filter Foam 40ppi Air Filter Foam