From The Pool Leak Academy comes a set of covers for static dye testing a floor system of a self cleaning swimming pool. The set comes with 8 covers which should be enough to test each zone or buy 2 sets and test the whole pool at once. Each flexible cover seals firmly over a head and is weighted down with a 5OZ lead disk. Added to the design is the ability to static test and seal a 4" pipe for repair. Buy 2 sets today!