The DE Spin Grid Filter Disc is designed for use with Sta-Rite pool and spa Diatomaceous Earth (DE) filters. With a 17” outer diameter, this high-quality filter disc provides superior filtration, capturing debris and particles as small as 2-5 microns. By efficiently trapping contaminants while allowing water to flow smoothly, it ensures your pool water stays crystal clear and your filter operates at peak performance. Constructed with durable materials, this filter disc is designed to withstand the demands of regular pool maintenance, making it an essential component for optimal filtration.