The DE Spin Grid Filter Disc is designed for use with various pool and spa Diatomaceous Earth (DE) filters, offering superior filtration to keep your pool water crystal-clear. With a 17” outer diameter and a 2-½” hub, this durable filter disc efficiently captures debris and contaminants as small as 2-5 microns, ensuring optimal filtration performance. Made from high-quality materials, it helps improve water flow, reduces strain on the pump, and is built to withstand the demands of regular pool maintenance.