The Unicel FG1004 vertical D.E. filter grid is compatible with American, Astral, Hayward, Jandy, Pac Fab, Premier Atlas, Purex, Sta-Rite, and Waterway. These Unicell FG1004 full grid filters are made from heavy-duty polyester and are designed to last far longer than cheaper alternatives. Measuring 24 inches long and 11 inches wide, these Unicel filters can cover 48 square feet of space to ensure your pool is cleaner than ever. Designed as a D.E. filter, these compatible filter types require 7 grids to work correctly. Ensure the cleanest water pool on the block with the D.E. Swimming Pool Filter from Unicel.