Features: 1. Strong adsorption: The filter ball is made of polyester, polypropylene and acrylic fiber, with high filtering strength and strong adsorption capacity. Good flexibility and low loss. It can capture tiny suspended solids that are not easy to settle and remove, making the swimming pool cleaner. 2. The perfect substitute for swimming pool filter sand: The swimming pool filter medium is designed to replace the filter sand of swimming pool sand filter. High-quality filter media can extend the service life of the filter, and it is a perfect substitute for filter sand, filter glass and other media. A 1.5-pound pool filter ball is equivalent to 50 pounds of pool filter sand a 2.9-pound pool filter ball is equivalent to 100 pounds of pool filter sand. 3. Reusable, washable and durable: unlike sand, the filter ball will not clog your filter, and less backwashing is required for maintenance. It can be cleaned regularly, is machine washable, recyclable, very durable, and has low loss. (Tips: Put the filter ball in the washing bag and machine wash). There is no sand in the swimming pool, which is more efficient than traditional sand filters 4. Simple to use and high efficiency: According to the water output and the turbidity of the sedimentation water, the filter speed is appropriately controlled to ensure the filtered water. If the water volume is too large, it will affect the performance of the fiber ball filter. If you find the ball is dirty, you just need to clean it. The frequency of use depends on the water quality. 5. Wide range of applications: suitable for swimming pools, aquariums, filter pumps, filter sand and other media. It is very suitable for summer swimming pool sand filters and other water filters to improve water quality and keep your swimming pool clean without the hassle and dirt of sand. The clear water allows you and your children to enjoy swimming even more. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: polyester, polypropylene, acrylic fiber Single ball size: about 45-50 mm or 1.8-2 inches in diameter Adsorption rate: 99.99 ( percent ) Density: 100 (g or cm3) Specification: 200g or 0.44lbs, 500g or 1.1lbs, 700g or 1.5 lbs, 1000g or 2.2lbs, 1300g or 2.9lbs includes: 1 pack x Pool Filter Balls(200g or 500g or 700g or 1000g or 1300g available ) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store