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The Unicel UHD-SR50 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel UHD-SR50 Comp. Replacement Sta-Rite TX-50 has an outer diameter of 8 11/16 inches, with a length of 13 5/16 inches. This Unicel pool filter has an open top and bottom, with both having a diameter of 4 3/16 inches. This Unicel UHD-SR50 filter contains 50 square feet of filter media.