This is a replacement for the older - now obsolete - Niko push-button switch cover. It is a touch larger - we are talking 0.1 mm's - than the one of Niko. The benefit is that your button as a whole will look more flush. The downside is that the buttons sometimes push against each other. There is less wiggle room.

To install them is not as easy as the original since the cylindrical pivot is a bit rough due to 3D print layering. So if you just push them in, the holder clamp on the button housing will bind rather than open up. My solution was to cut a very small part from the holder clamp so that the top of the clamp is shaped like a funnel. Also I applied a bit of vaseline to the cylinder on the button.