Unfortunately leaking, mounting not possible everywhere

This part (shut-off valve and lever "in one piece" made of a silver-gray plastic part) is in the closed position is not dense and reduced in the open position a little to the cross-section, because it is not a metallic ball valve, but a plastic flap valve that furthermore not fully seals.

Since the handle will not break down (see. Like valve of NEOPERL), you can not mount the part on some mixers, namely when the connection of the hose is too close to the wall.

Unfortunately, it looks as if only this part is commercially available.

The counterpart of NEOPERL but has the problem that the lever after some time or frequent use is no longer "takes" and you then the valve position can not change. One must then replace at least the plastic tab (see my review for that).