We will demonstrate the principle when looking at the vertical (front and rear, left and right) of piping. Since there is no cover on the water pipe, you can check without having to go around the horizontal air attached directly in front of you. The advantage of being able to minimize movement is great because we want to maintain the system holding piping as much as possible for positioning. The leveling unit itself is also compact and suitable for walking to carry. Since it is a horizontal instrument that is also used around, it will be appreciated if you develop color. For work requiring a little more precision, I also want 450 mm size and 600 mm size.