Product description: Type: pool filter socks (baskets not included) Material: Cotton Color white Size: approx. 13 * 22 cm Weight: approx. 147g Quantity: 20 pieces Scope of delivery: 20 * filter bags Description: Universal Fit Skimmer socks can be used with most pool skimmer baskets. Material The pool skimmer socks are made of good quality nylon cloth, and they have good elasticity to stretch easily and enough to cover the skimmer basket, fit for swimming pool use. Easy to Use Install in seconds, simply slide the sock over the basket and it's ready for collecting dirt from the water. Extend the service life of your swimming pool filter system Pool socks protect the pump impeller and shaft seal from damage and clogging and thus extend the service life of your pool filter and filter system. Please do not use the product while dissolving a chlorine tablet in your basket Otherwise, the soc will be eroded. And you should replace or clean the socks every 4 to 6 weeks if they are too dirty to allow water to flow.