This combination is made of several separate units. Use BESTÅ top panel, sold separately, to cover the joint between the frames and create a uniform look.
Different wall materials require different types of fixing devices. Use fixing devices suitable for the walls in your home, sold separately.
The push-open function requires a space between the frame and the drawer front to allow the drawer to be pushed to open. The small gap is necessary to allow this function and is not a product deviation.