1Monitoring Range: This indicator can monitor tilt angle of 25 to 25 degree, suitable for RV leveling, bed leveling, or woodworking leveling. 2Accurate Reading: The brass ball is placed in a special damping liquid, which can achieve smoother and more accurate level gauge readings. 3Higher Visibility: Clear indicator tube and brass ball provide higher visibility than traditional bubble level, improving measurement efficiency. 4Plastic Material: The slope indicator tube is made of excellent plastic, crush resistant and scratch resistant, and can be used in various environments. 5Easy Installation: With adhesive tape for paste installation, including 2 guide holes for screw installation, can be installed inside or outside the RV. 1 x Leveler 1 x Adhesive Tape