Ensures surfaces are evenly horizontal and vertical Levels two ways at the same time: horizontal and vertical Use the bubble as a leveling guide When the two bubbles are perfectly centered between the lines, that means the surface is level Dimensions: 2-1/2' x 1-3/4' RV Designer E411 Bubble Level - Two-Way, 2-1/2' x 1- 3/4' SKU: 1023.2947 UPC: 601320984119