General description The Bestway Flowclear Polysphere Filter Balls (item number 58475) are an eco-friendly alternative to traditional sand filters, designed to enhance pool water filtration efficiency. Made from 100% PET, these filter balls have a grain size of 5 cm and provide a longer operational lifespan compared to sand, resulting in reduced energy consumption for your pool filter. Technical specifications Material: 100% PET Diameter: 5 cm Weight: 500 g (equivalent to 18 kg of sand) Compatibility and accessories Suitable for all Bestway sand filters Usage Excellent filtration results and efficiency Easy to wash by hand Non-toxic and easy disposal Other information