1. With elasticity and ultra-fine nylon mesh, these pools live like nets, attract and trap leaves, grass, hair, scum, oil, pine needles, pollen, insects, swimming pool filtration system, etc. To prevent them from blocked. 2. swimming pool filter / socks in the filter system, protect the pump impeller and the shaft seal / will block, prolong the life. 3. Shallow Mouth Shoe Basket Socks will clean more convenient Shallow Mouth Shoe Basket, reduce clutter. 4. Easy to install: the easy to stretch fabric can fit your basket perfectly, so it will not be loose, but you can install and replace it in a short time. 5. When soiled, clean rubber hoses are rinsed and reusable or discarded (if heavily contaminated). Replace the socks every 4 to 8 weeks. Do not use to dissolve a chlorine tablet, shopping basket (socks will weaken). Quantity:20PCS Colour:As Shown Material:Nylon fiber Package Contents: 20 * Swimming pool filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.