These pre filter sponges are designed for canister filters and Aquaclear 70 and 110 filters. Can also work for Aqueon and other larger hang on back filters as well.
Intake hole: 1 1/4 inch
Diameter: 3 1/2 inch
Length: 5 1/2 inch
*Pore size on the foam has a range of pores per square inch based on manufacturing process. The large pre filter is designed to have larger pores to not reduce the flow of a canister filter.