... factory direct sell,competitive price Description 1 polyurethane foam material 2 reticulated, mesh,10ppi-70ppi, ... long term 5 widely used in aquarium filter ,water filter ,air filter ,water pump,medical machine 6 function: ... protection, dust-proof,anti-bacterial, flame retardant , filter water well 7 no toxic , no harmless, environment ... Packageother details you have Acoustic Reticulated foam-filter foam