Swimming Pool Filter Cartridge Specifications: (Please confirm the required size before purchasing). Type: S1 Type Foam Filter. Material: Sponge. Dimensions: Approx. 108 * 73mm / 4.25 * 2.87inch (L x W): Weight: 11.8g. Package Included: 2/4/6/8 * Swimming Pool Filter Foam. Features: 1. The filter element is installed in the filter pump and collects the dirt flowing through the system. 2. Our filters filter dust, hair, dirt, and flies and can clean your water more effectively. 3. This foam filter can survive in the carton and can be washed and reused multiple times. 4. It is recommended to replace one carton per week, and these foams can be easily cleaned and replaced. You should see how the foam filter lasts about 2 months. Note: The data are all manual measurements, please allow an error of 1-3cm; due to the difference in light and display, there would be some color difference, please refer to the actual object received. 💡Note: Due to manual measurement, the size may have an error