... good filter function the filter foam is widely used in air conditioner,water pump ,water treament,acquairum,environment project 1 polyurethane and polyester foam ... material .2. veticulate,mesh,10ppi to 90ppi.3. good resilient.good air permeability(95%) Tensile ... time,we often export the air fillter foam to USA HenKel company . good aqurium filter ...