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The Sta-Rite S7D75 R is a compatible replacement for the following DE grid filters:
The Sta-Rite S7D75 - System 3 Center Port Filter Grid is a pool filter grid measuring 9.7" in diameter and 18" in length. This compatible Sta-Rite filter has a 100% polypropylene cloth that effectively improves water quality and has a high dirt holding capacity.