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The Unicel C-4316 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-4316 Comp. Pool & Spa Water Filter has an outer diameter of 4 15/16 inches, with a length of 5 1/2 inches. This Unicel pool filter has a closed top with a knob style handle, and an open bottom with a diameter of 1 9/10 inches with slots. This Unicel C-4316 filter contains 16 square feet of filter media.