Simply place the washbasin plug in the drainage hole and the installation is made - there is no easier - the height of the universal sink cap easily adjusted between 6.5cm and 8.5cm atractive and with a high quality chrome finish that corresponds to your existing bathroom facilities and that can last many years - we also added an anti-limestone layer for avoid calcification and ensure durability This sink flap has a rugged rubber ring and four side wings to keep it perfectly in place, without moving