Specifications Hign-concerned Chemical:None Model Number:White Filter Ball Origin:Mainland China Material:Polyester Fiber Features: 1. POOL FILTER BALL:Premium filter media extends the life of the filter and is a perfect replacement for filter sand, filter glass and other media. Weight: 700g, can replace 25kg of filter sand. 2. Convenient: Compared with sand, the filter balls are much easier to add or change. For all existing sand / glass filter systems for swimming pools. Higher flow rate, up to 45%. The light ones. As a pool cleaner, our filter balls are universally suitable for almost all filter vessels. Also suitable for sand filter pumps in salt water. 3. MATERIAL:Made of high quality fiber, lightweight, high resistance to filtration, fast filtration speed, good elasticity, large porosity, acid and alkali resistance, recyclable. 4. REUSABLE, Sustainable & Energy Saving :With proper care, they can last for several seasons. These reusable filter balls are machine washable and you can clean them if necessary.Filter balls can be washed and reused. Save energy, cost and other swimming accessories. 5. EASY TO USE:Just place the filter balls into the container of the sand filter system, then turn on the machine and start working. 6. WIDE APPLICATION:Great for both swimming pool,filter pumps,and aquarium, the use of the filter ball gives you the clean and clear water quality effect ! Specifications: Product name: Pool filter ball Material: Polyester Fiber Size: Diameter: 30-60mm Density: 1.38g/cm Fitment: Suitable for all existing sand / glass filter systems for swimming pools. Package Included: 1 Pack Filter Balls / 700g Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. When you place an order, please choose a shipping way and pay for the order including the shipping cost. We will send the items as soon as possible. We do not guarantee delivery time on all international shipments due to differences in customs clearing times in individual countries, which may affect the time you get the parcel. Please note that buyers are responsible for all additional customs fees, brokerage feeds, duties, and taxes for importation into your country. These additional fees may be collected at time of delivery. We will not refund shipping charges for refused shipments. The shipping cost does not include any import taxes, and buyers are responsible for customs duties.