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By certification 
The filter ball is made of polyester fiber bundles bundled and cut, does not float on the water surface, has the advantages of long description and can be backwashed.
We are a manufacturer of filter balls, with our own factory and quality inspection team, so you can rest assured in terms of product production speed and quality.
The filter ball has a large specific surface area, which can filter pollutants in the water more efficiently.
Currently the most popular pack is 700g poly bag with color sticker. We support packaging customization, and customers can customize their own labels and logos.
http://www.poolfilterball.com/
