Bullet points:1, Easy to clean: the filter cartridge is easy to clean and described by the fiber material.2, a little tip: the filter cartridge should be replaced every two weeks.3, easy to use: no assembly is required, so you can easily use the filter cartridge.4, clean impurities: the filter cartridge is an effective, filter-friendly filter element for more thorough filtration and filtration of impurities in the water.5, Wide Application: The filter cartridge is suitable for swimming pools, fish pond and so on. Specifications(Info):Name: 300 gallon pool filter cartridgeMaterial: Polyurethane + non-woven fabricColor: whiteWeight: about 70gSize: outer diameter: 79mm/, height: 86mm/, inner diameter: 45mm/ (outer diameter: 3.11 inch, height 3.38 inch, inner diameter 1.77 inch)Suitable filter: HS-630, D79*H86MMflow rate: 300 gallons, about 3.78 liters per hour Packing List:Filter cartridge*1