VI filter out cartridge: height: eighty mm, outer diameter: 104 mm, within diameter: 51 mm. Suitable for Lay-Z-Spa Hot TubsThe filter detail is fastened within the filter out pump and catches dust when passing in the course of the system, helps eliminate dirt and bacteria and provides you with clear and brand new water to the nice materials mix, cartridges would be smoothly wiped clean and reused is recommended to exchange the filter out element every single two weeks in summer season to maintain the water clear installation, no tools required