General description vhbw filter balls offer a sustainable and efficient alternative for your sand filter system. These filter balls provide impressive filtration performance, making pool maintenance more convenient and effective. With the ability to replace 17.5 kg of traditional filter sand, they are a lightweight and eco-friendly solution for keeping your pool clean. Technical specifications Diameter: 5 cm Height: 8.3 cm Material: polyethylene Colour: white Weight per package: 500 g Filter performance: up to 1.5 microns Replacement cycle: every 2 - 5 years Reusable and washable by hand or in the washing machine Non-toxic and recyclable Compatibility and accessories Compatible with Arebos and sand filter systems with a filtration rate of 20-40 m³/h Replacement for 58475, 040050 Other information Delivered vacuum-packed for easy handling and storage