Specifications: Material: elastic nylon material Lay flat size: 13cm*22cm/5.1”*8.6”. Flexible, stretchable size, suitable for various types of swimming pool baskets Function: Suitable for swimming pool basket, filter small impurities to keep your filter clean, protects your filter system, saving you money Package Includes: 50 packs of pool filter skimmer socks NOTICE: Do not put swimming pool disinfection tablets in the skimmer basket sock, otherwise the filter socks will be damaged and have holes!