Ingenious and extremely useful, this key allows you to easily remove the aerator (which is also called a diffuser) of your tap to clean it, remove the lime scale which is clogging it up or replace it. Comes with 2 models of spare aerators. In metal and plastic. Dimensions: key, 10 × 4.5 × 1.5 cm; aerator, diameter 2.2 × 1.2 cm and diameter 2.2 × 1.6 cm.