Good addition to the pool, have a diameter of 4.57 Intex. Just the blue screen in the pool, unscrew, screw on the adapter and also postpone supplied hose. Absolutely now it keeps perfectly recommend Ewert - 2 mounting options, a rubber plate were provided at the edge (air ring, steel tube) In our pool (steel pipe), we have thus the stability of the skimmer is given (is tilted away us upwards given over the steel pipe...