first later - order a box of six, get four (ordered six so I could distribute them) in different areas of the RV. 2nd - take out of the box - side by side - a horizontal bubble on the two on the right, the other two in the middle. After a few minutes everyone shows the way to the level. I I can't imagine trusting them with my level raisers. It's time to buy a level to match the investment in my RV.
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