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The Sta-Rite S7D75-3 R is a compatible replacement for the following center port filters:
The Sta-Rite S7D75 Center Port Filter - 18 x 15 3/16 is a replacement grid filter that measures 15.18" in diameter and 18" in length. This compatible Sta-Rite filter features 100% polypropylene cloth and high dirt retention to purify swimming pool water.