Filbur FC-9540 Replacement DE Grid for Universal Pro Kit 48 Swimming Pool Filter High quality durable polypropylene cloth grid Stronger, more durable frames outlast the competition; reinforced frames and connections 100 percent polypropylene cloth finished to our exact standards assures precise control of filtration efficiency, dirt holding and decake release Fewer glue joints and re-enforced spines increase the torsional strength and prevent snapping Sold as complete kits