General description Are you looking for a sustainable, environmentally friendly yet efficient alternative for your sand filter system? The vhbw filter balls are the perfect solution for you. With an impressive filter performance of up to 1.5 microns, they provide more convenient and effective pool maintenance compared to traditional sand filters, which only filter down to approximately 40 microns. The 500 g filter balls replace 17.5 kg of filter sand, making them a lightweight and practical choice. Technical specifications Diameter: 5 cm Material: polyethylene Colour: white Weight per package: 500 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 Other information Content of delivery: 2x 500 g filter balls vacuum packed