1Premium Material: The filter medium is made of pp polyester fiber cloth, which has good mechanical properties and solar energy properties, high temperature resistance, and is not affected by strong acid. 2Keep Pool Water Clean: Swimming pool filter cartridge can keep the pool water clear and work with the pool pump to provide excellent performance. 3Washable Pleated Fabric: Durable and washable pleated fabric that retains strength even when loaded with sediment. Filter cartridge size is 204x104mm / 8.0x1oz. 4High Flow Core Design: Our high flow core is designed to support the filter while providing flow rate and while reducing wear on the pump. 5Easy to Clean: It is esy to clean when needed, scrub with filter cleaning tool, then wash under strong water pressure to remove loose particles from filter cloth. 6Replace in Time: For maximum efficiency, it is recommended to clean the filter cartridges weekly and replace with a new filter every two weeks.