SAFE MATERIAL: Pool filter balls is 100% polyethylene, does not contain toxic and harmful substances and does not affect the quality of the water. SIMPLE AND EFFICIENT: Filter balls has excellent filtering effect, easy to operate, good elasticity, light weight, high strength, long working period and low loss, which is more efficient. CLEAN AND COMFORTABLE: Pool sand filtration is economical and replaces 25 kg of sand with 700 g balls. Filter the smallest impurities from the water to bring cleanliness and comfort to the pool. ENVIRONMENTALLY FRIENDLY AND RECYCLABLE: The filter ball is easy to handle, reusable and renewable. The filter balls can be machine cleaned or manually cleaned, saving time and energy. WIDE RANGE OF USES: Swimming pool filter sand has strong functions and is very suitable for swimming pool cleaning.It can replace sand in swimming pool sand filter and is compatible with all sand filters / p> The sand filter balls are truly innovative, providing you with entertainment and creating an unforgettable experience. Product specifications: Material: Polyethylene Weight: 700g Appearance of the sphere: white, round The packaging includes: 1 pack of pool cleaning balls (700g)