[Material]- are made of nylon cloth and they have good elasticity to stretch easily and enough to cover the skimmer basket, fit for use in swimming pools. [Size]- 22 x 13 cm / 8.66 x 5.11 inch (LW), and the package contain 40 pack, enough for your use for a long time, Easy to clean and reusable. [Application]- Our skimmer basket filters can catch the finer plant / tree leaves, pollen, beetles and other tiny things. You do not have to change the filter as often to save costs. [Easy to Install]- Install in seconds, just slide the sock over the basket and it's ready for collecting dirt from the water. []- Pool Filter Saver Socks Net Good protection for your garden pool filter system. Colour:White Material:nylon Size:22x13cm Package Contents: 40 x . 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.