Swimming Pool Filter Ball The swimming pool filter ball is made of polyester, which is an ultra-lightweight and environmentally friendly material with excellent durability, good water permeability and good drainage. The high elastic swimming pool filter ball can quickly and powerfully filter impurities in the water.Reliable Swimming Pool Sand Filter: The swimming pool filter ball has high filtration speed, low energy efficiency, high adsorption capacity and long service life. These pool filter balls keep your pool cleaner by trapping tiny suspended solids that aren't easily removed by sediment.EASY TO USE: Pool sand filter balls are super easy to replace, unlike sand, pool filter balls won't clog your filter and require less backwash maintenance.Wide range of uses: Equivalent to 30 kg of pool filter sand, but more energy efficient than traditional filter sand. These filter balls are not only used for swimming pool cleaning and filtration systems, but also for swimming pools, aquariums, filter pumps, aquariums and other media.Recyclable and reusable The ball filter can be reused as it is machine washable without clumping. The pool filter ball is non-toxic, recyclable and environmentally friendly. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object received Delivery Quantity: (according to the main image)