XIANQI Package includes 20 pack of pool filter skimmer socks. Flat length and width size is 13cm*22cm/5.1*8.6. ( Pool skimmer basket not included.) These pool filter socks are made from nylon materialwith fine mesh and strong elasticity, it is suitable for various types of skimmer baskets and can filter all kinds of small impurities. It will keep your filter clean, protects your filter system, saving you money. Using a pool sock protect the pump impeller and shaft seal from damage / clogging, thereby extending the life of your pool filter / filtration system. Economical and practical, these skimmer socks can reuse for many times after cleaning, but if you dont want to clean it, you can throw it away after use. NOTICE: do not put swimming pool disinfection tablets in the skimmer basket sock, otherwise the filter socks will be damaged and have holes.