Features: You can totally get 3 lbs pool sand filter media in the package, and every 1.5 lbs filter balls is equivalent to 50 lbs filter sand, enough to meet your daily use and replacement needs. The pool filter media is lightweight and portable, you can easily use it indoors and outdoors to keep swimming pool clean. The swimming pool sand filter has good filtration effect and requires less backwash for maintenance, is an ideal alternative to filter sand, filter glass or other filter media. The pool filter sand balls can reduce the blocking risk compared to other pool filter media. The provided mesh bag allows you to store the filter balls when they need cleaning. Specifications: Material: polyester, polypropylene or acrylic fiber Color: blue Weight: about 3 lbs Package includes: 3 Lbs pool filter balls Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays. The filter balls are vacuum packed and need to wait for returning to their original states.