Sponge Replacement Pack for the Rio Pro-Filter. These pre-filter sponges are designed for Rio Water Pumps, Canister Filters, and Aquaclear 70 and 110 filters. Can also work for Aqueon and other larger hang-on-back filters as well. The pre-filer coarseness is 40 PPI, Fine. Ideal for filtering out small and fine particles.

• Ideal for Pond, Aquarium, Freshwater, and Marine environments
• Pro Filter Sponge Dimensions: 5.5"L x 3.5" Outer Diameter
• Intake hole: 1.5" Wide
• Inner Length: 4.5" Long - The Intake hole is not all the way through