The 37 Sq Ft Sta-Rite® System 3 DE Grid Set is an essential replacement for the Sta-Rite System 3 S7D75 DE filter, providing 37 square feet of filtration. Designed for superior performance, this grid set ensures your pool or spa stays clean by efficiently trapping contaminants, leaves, and debris. Made with high-quality, durable materials, these grids provide excellent filtration and long-lasting reliability. The set includes 11 grids, each designed to hold Diatomaceous Earth (DE) powder, allowing for optimal filtration and maintaining water clarity by removing even the smallest particles.