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1.Polyurethane foam material2,Reticulated, mesh sponge,10ppi-60ppi, can offer open cell and closed cell3 Good resilient, good air permeability (95%) Tensilestrength kpa ≤ 100 elongation percentage % ≤ 90 TearingstrengthN/CM ≤ 104 Could keep the colour for long term5widely used in aquarium filter ,water filter ,air filter ,water pump,and cleaning area,6 function :UV-protection , bacterium-proof, dust-proof, mildlew-proof,environemental protection , no toxic,absorptiong noise,stand certain press, high air permeability ,not easy to change the shape , durable, have long life andlow cost