Description Perfectly compatible with Polaris 280 and 480, K13 and K16 robotic pool cleaners. Same design and quality as the original. Quality components: ultra-fine mesh to capture the finest dirt, high-quality zipper, durable seams with reinforced edges. The connection between the bag and the sturdy plastic fastening ring keeps the bag's opening open at all times, ensuring better waste passage. Easy installation and use thanks to the automatically locking claws, the Velcro strap for attachment to the tube for better dirt passage, and easy opening of the bag thanks to the high-quality Velcro strap across the entire width of the bag. Set of 2 sludge bags, adjustable via zipper for Polaris 280 or 480 robot. Quality at the best price. Product description Set of 2 sludge bags. Adjustable sludge for Polaris 280 or 480 pool robot, model identical to K13 K16. The bag closes with a zipper. High-quality materials for longer life.