Material specifications- Polyethylene material, recyclable; weighs 700g, can be washed. Functions - Filtering out the smallest impurities in the water aims to bring your swimming pool clean and comfortable Features - Lightweight, high strength. It is durable and can help you clean the pool. Provides an excellent filter result. Great dirt absorption capacity. Reuse - The empty space of the filter layer decreases in the flow direction, and the porosity distribution is small, forming a fast filtration rate, large interception, being reusable and renewable, saving time and energy. Easy and effective - Just pour it on the machine to filter the water, the filter balls are easy to use, but with an effective result