Function: The filter socks filter wastes such as leaves, grass, hair, foam, etc. like a net, which helps keep the pool clean and saves costs. Dimensions: 21.5 x 12 cm (L x W), the socks are elastic enough to stretch easily enough to cover the skimmer basket, suitable for swimming pools. Tip: 1. Generally, it can be used for 4-8 weeks, and the effect is very good. If it is dirty, please wash it before wearing it or throw it . 2. Good choice for checking socks weekly or daily; if there is too much trash, they will overflow and stain the sink. Color: White Material: nylon Package Contents: 20 x 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.