These little ones were great. We have leveled an area of 120 square meters. Feet from edge of feather to 7/8 inch at its lowest point. There were sections that went down 1/4 inch within 9 inches. We used a 12ft MDF baseboard, spacers and a level to lay everything out and then glued it to the concrete. They mixed the Mapei self-leveling plate and got to work. It has helped us put things in the right places and knowing we have things where they need to be. Highly recommended! Also - as for the packaging - they were ONLY curved - so for our needs (overall height less than 1 inch) they worked perfectly.
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