For Aqua Products cleaners still under warranty, this certified Aqua Products 2 micron fine filter replacement bag must be used when replacing your filter bag to prevent voiding the warranty. For use with single-bag Aqua Products cleaners including Aquabot, Pool Rover, AquaMAX Junior, UltraMAX Units and AquaFirst In-Ground Cleaners. Easy to remove and clean. Elastic band opening fits around existing plastic frame. Economy replacement filter bag (Swim Time NE360) also available for Aqua Product cleaners no longer under warranty.