The ADE300-06 pre-filter foam is approximately 3/8" thick x 1-1/4" Diameter. For use with Rena Flow fountain/pond/aquarium models requiring a round disk-type filter. This includes models RF300S/RF600S/P300A/P600A/RF300B/RF600B. The filter is made of fine pore 30ppi (pores per inch) aquatic-grade foam. Alternate item number ADE600-06.
