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The Unicel C-3612 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-3612 Comp. Pool & Spa Filter Cartridge has an outer diameter of 3 1/4 inches, with a length of 14 11/16 inches. This Unicel spa filter has an open top and bottom with both having a diameter of 1 1/16 inches. This Unicel C-3612 filter contains 12.5 square feet of filter media.