Specifications: Made of premium sponge material, it is durable and practical. It is suitable for Oase BioPress, for PondoPress. The foam filtration removes debris from the pond water. Super porous foam material helps keep pond water crystal clear. Item Name: Sponge Filter Material: Sponge Features: Easy to Install, Durable, Cleaning Tools Blue Filter Size: 15.2cm x 15.2cm x 3.3cm(Approx.) Black Filter Size: 15.2cm x 15.2cm x 9.0cm(Approx.) Notes: You will find more amazing products if you visit our store. Due to the light and screen setting difference, the items color may be slightly different from the pictures. Due to different manual measurements,allow for slight size differences. Package Includes: 1 x Blue Sponge Filter 2 x Black Sponge Filters