... spongeFilter sponge including air filter sponge,activated carbon filter sponge,air filter sponge,air-condition filter sponge,aquarium filter sponge,ceramic ... beginning effect filter,amid effect filter sponge and high effect filter sponge according to the aperture and usage ... ,dedusting and adsorbing,etc.Filter sponge also named reticulation sponge,blasting sponge.filter sponge is made of ordinary open ...