The 26 ¼” Full Grid Filter is designed for the Star and Star Polymeric ST80 Pool and Spa Diatomaceous Earth Filters, offering superior filtration for crystal-clear water. With a size of 26-¼”, this heavy-duty polyester grid features a reinforced core for added stability and durability. These grids fit seamlessly into Pentair Star and Star Polymeric ST80 filters, effectively trapping even the smallest particles from pool water. By optimizing water flow and supporting Diatomaceous Earth powder, this filter grid plays a critical role in maintaining your pool’s cleanliness and reducing the load on the pool pump.