This is a blue 2 foot by 2 foot corner water tube for securing inground pool winter covers. The water tubes are placed around the perimeter of an inground winter pool cover keeping it from sinking into the pool. This piece fits conveniently in the corner creating a continuous perimeter around your pool. Just slide water tubes through the water bag loops on your winter pool cover. Ideally, the tubes should be side by side around the pool.
This is a standard vinyl water tube made with 16 gauge vinyl and has a single chamber. The valve on the tube is leak proof.