Inland Seas Nu-Clear Canister Filter Replacement Cartridge, 25 Micron, 25 sq ft

Replacement cartridge for the Red Sea Ocean Clear 325 Canister Filter (25 Micron, 25 sq ft). Can also be used with any of the Nu-Clear Canister Filters . Dimensions: 8.5" wide and 8 3/8" tall. Center hole is 4" wide.