This complete element grid assembly is designed to use with Pentair 36-square feet FNS Plus pool and spa D.E. filters. ---------- At Pentair, we've revolutionized the pool industry with innovative and high-performance pool pumps, filters, heaters, cleaners, lights, automation systems and more. Each product is expertly engineered and crafted with pool and spa owners in mind, and adheres to our strict standards for quality performance and design. Decades of commitment to reliable, technologically advanced, and energy-efficient pool products has built our reputation as the pool industry's global leader.