High Versatility Filter BallsSingle filter diameter 50cm; total weight: 700g It can replace 25kg filter sand. The filter balls are universally applicable to most filter boiler pool cleaners. It is also suitable for saltwater sand filter pumps. Filter ball Material: The swimming pool filter ball is made of 100% polyethylene, which is recyclable, flexible, non-toxic and stable. Weight: 700 grams, which can replace 25 kilograms of filter sand. Super Durability and Recyclable UseHigh dust retention, high water permeability, lighter and more efficient filtration.environmentally friendly and recyclable. Have a long service life and save energy. It has the advantages of high filtration resistance, fast filtration speed, long service life, good reusable elasticity and low loss. Filter Balls Simple and effective Just pour it on the machine, also suitable for your sand filter system. The filter ball is easy to use and can be used in any common sand filter system. Achieve excellent filtration easily. Widely Applicable Reusable Swimming Pool Filter Balls: Our Filter Balls are universally applicable to almost all pool cleaners in filter tanks. It is also suitable for saltwater sand filtration pumps. Widely used in swimming pools, aquariums, filter pumps, filter sand and other media.-2