General description vhbw filter balls offer a sustainable and efficient alternative for your sand filter system. These innovative filter balls provide impressive filtration performance, allowing for better pool maintenance without the hassle of heavy sandbags. With a filtration capability of up to 1.5 microns, they outperform traditional sand filters, which only filter down to approximately 40 microns. Each 1000 g pack of filter balls replaces 35 kg of filter sand, making them a convenient and eco-friendly choice. Technical specifications Diameter: 5 cm Height: 8.8 cm Material: polyethylene Colour: white Weight per package: 1000 g Replacement cycle: every 2 - 5 years Filter performance: up to 1.5 microns Reusable Washable by hand and in the washing machine Non-toxic & recyclable Compatibility and accessories Compatible with Bestway and sand filter systems with a filtration rate of 20-40 m³/h Replacement for models 58475 and 040050 Other information Delivered vacuum-packed for easy