RV Designer Bubble Level Pocket 1 3/4in x 1 3/4". This RV Designer Pocket Bubble Level ensures surfaces are evenly horizontal or vertical. Misalignment or crookedness in the surface indicates that the level is off causing the structure to sag or become unusable. This level measures three ways at the same time: horizontal vertical and surface. To make sure a surface is level simply place the device on the surface and move the bubble to the center of the bottom and side to measure the distance from the vertical horizontal and surface at the same time. For added precision use the bubble as a leveling guide. The small footprint ensures you can use this device anywhere. Each package includes two pocket levels. Features of RV Designer E403 Bubble Level Pocket 1 3/4in x 1 3/4" Ensures surfaces are evenly horizontal and vertical Levels three ways at the same time: horizontal vertical and surface Use the bubble as a leveling guide When the bubble is perfectly centered between the lines that means the surface is level Dimensions: 1-3/4" x 1-3/4" Package Contents: RV Designer E403 Bubble Level Pocket 1 3/4in x 1 3/4" RV Designer E403: Bubble Level Pocket 1 3/4in x 1 3/4"