This package includes 10 skimmer nets measuring 24 x 13 cm. These skimmer basket socks are made of ultra-fine nylon mesh and are very elastic, fitting perfectly in the skimmer basket, pool skimmer, pool pumps, and filter baskets. They are ideal for protecting the pool filtration system, preventing damage and obstructions in the pump impeller and shaft seal. Additionally, they are very easy to install and help keep the pool clean by trapping oil, hair, insects, leaves, and other small debris that can clog the filtration system. An effective and economical way to protect pool filters!