Shake off the summer heat in a cool pool. Make a splash in the cleanest swimming pool in the neighborhood with a Unicel pool and spa replacement filter cartridge. When it comes to pool maintenance, do it right with this high-quality replacement filter. Easily install into the skimmer for better water quality at an instant. Whether your filter gets jammed with algae, sand, leaves, or more, this filter delivers quality results. This filter cartridge features an open-ended top and bottom end cap. With 250 pleat count, 4-ounce filter media, and a 250-square-foot filter area, spend less time cleaning and more time enjoying your pool with this efficient filtration system. Canon-ball into summer with Unicel replacement filter cartridge.