【Environmentally Friendly Material】Filter balls are made of recyclable polyethylene, lightweight material, high permeability, non-toxic, strong adsorption capacity and long service life. Environmentally friendly materials are your best choice. 【Significant filtering effect】Filter Balls ball diameter: 50mm to 60mm, weight 700g, can replace 25kg of filter sand. Filtration speed 4 times faster than traditional filter media, greater recovery capacity. It can capture tiny suspended matter, They are lighter and more efficient than traditional filter sand. 【Durable and energy saving】Swimming pool filter balls can be washed and reused. Save energy, cost and other swimming accessories.It has the advantages of high filtration strength, fast filtration speed, long service life, reusable. 【Easy to use】The pool filter balls pool sand filtration are very easy to replace, Unlike sand, the pool filter ball does not clog your filter and requires less backwashing for maintenance. 【Widely used】The