- Size: 20 - Pack of 20 pool skimmer filter socks made of ultra-fine, elastic nylon - Effectively trap leaves, grass, hair, foam, oil, pine needles, pollen, insects, and other debris - Universal size of 13 x 22 cm, suitable for most pool baskets and filters - Easy to install and remove thanks to their elasticity and durability - Protects the filtration system from damage and clogs, extending its lifespan - Keeps pool water clean and reduces the need for frequent maintenance - It is recommended to replace or clean the socks every 4 to 8 weeks to avoid reduced water flow - Do not use while dissolving chlorine tablets in the basket to prevent damage to the material