For our environment: due to 100% recyclable polyethylene, long life. Now use your preferred alternative to filter sand or filter glass. Because machine cleaning and hand cleaning, it can be reused for many times - therefore, you have promoted your wallet at the same time. Glass water: simple design and single from the pool. They are very suitable for the cleanliness of the aquarium, swimming pool, swimming pool or garden. The 3D deep filter can ensure the cleaning pool. Maintaining dense pools can also save flocculants. There is more sand in the pool: the structure of the filter is much thinner than the cells of the sand filter, and the cleaning of the water is more accurate. Then use 1.5m to compare filtering dirt particles, only about 40m of filtering sand filter. Compared with washing machine equipment and sand filter: the pool filter fits current sand filter. The pool cleaner can be "fixed" at the greatest degree of 30 degrees in the washing machine. Product advantages: Polyethylene filter replacement-700 G 100% REPLACEMENT 25 kg of sand sand sand in the 3D filter pool of the 3D pool is it with a high content of sand residue. Rebuilding process and long-lasting service life Technical characteristics: Material: 100% polyethylene. Number: 700 G diameter: 5 cm 700 g of filter and 25 kg of filter sand. The 50 liter filter system requires 640 grams of filter.