Specifications - Material: 100% polyethylene. Diameter: 50-60mm. Weight: 700g, can replace 25kg of filter sand. Professional design - High water permeability, light weight, efficiency, excellent filtration effect, environmental protection and recyclable. Efficient - The new generation of filter balls has a faster filtration speed and greater collection capacity than traditional filter media. Can be washed. Long service life. Wide applications - swimming pool, swimming pool, filter pump, fish tank, etc. Product Description Filter Balls for Pool Swimming Pool Filter Pump Aquarium If you want to climb into your pool, you should be prepared for a lot at any time of the year. Proper cleaning and hygiene are essential for this, so that your pool appears clean and crystal clear in all seasons. The filter balls are easy to clean, protecting the environment and your wallet. 100% recyclable and reusable multiple times with simple machine or hand cleaning. (If necessary, simply wash with a small amount of washing liquid at 30 water temperature). Made from 100% recyclable polyethylene and 100% recyclable 700 g of the filter balls replace 25 kg of filter sand - lighter and more efficient Filter suspended particles, high adsorption capacity, lower flow resistance than filter sand. Easy to use: simply remove the existing sand/glass residue from your filter canister and clean it. Then simply fill with the filter balls and you're done. Specification: Material: Polyester. Diameter: 50 - 60 mm. Weight: 700/1400 g.