Specifications:Made of premium sponge material, it is durable and practical.It is suitable compatible with Oase BioPress, compatible with PondoPress.The foam filtration removes debris from the pond water.Super porous foam material helps keep pond water crystal clear.Item Name: Sponge FilterMaterial: SpongeFeatures: Easy to Install, Durable, Cleaning ToolsBlue Filter Size: 15.2cm x 15.2cm x 3.3cm/5.98" x 5.98" x 1.30"Black Filter Size: 15.2cm x 15.2cm x 9.0cm/5.98" x 5.98" x 3.54"Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Blue Sponge Filter2 x Black Sponge Filters