Easy to install, no tools required. Please replace and wash them every 2-3 weeks to keep the water clean filter pumps to filter out all debris to keep pool water clean Ensures that filter pump runs more efficiently Colour:blue+white Material:PET+non-woven fabric Package Contents: 6 x Pool Filters 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.