... example,home cleaning,gardening,water filter,air filter and so on 1.polyurethane foam material2.reticulated,mesh,10ppi-90ppi,3.good ... for long term5.widely used in paint the wall,filter water quickly,paint the wall averagely6.function:UV-protection ... ,dust-proof,anti-bacterial,flame retardant,filter water well7. no harmless,no toxic,environment protection brushes sponge,filter foam