The Unicel C-9950 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-9950 Comp. Pool & Spa Filter Cartridge has an outer diameter of 10 1/16 inches, with a length of 17 1/2 inches. This Unicel pool filter has an open top with a diameter of 3/8 inches, and an open bottom with a diameter of 6 inches. This Unicel C-9950 filter contains 50 square feet of filter media.