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 debris, high-end zip closure, strong seams with reinforced edges. The connection between the bag and the rigid plastic fixing ring keeps the bag entrance always open and allows better passage of waste. Installation and Easy to use thanks to the automatic locking claws, the Velcro fastening to the pipe for better passage of debris, easy opening of the bag thanks to the quality Velcro which runs the entire width of the bag. Sets of 2 silt bags adaptable to ZIP