Features Monitoring Range: This indicator can monitor tilt angle of ‑25 to 25 degree, suitable for RV leveling, bed leveling, or woodworking leveling. Accurate Reading: The brass ball is placed in a special damping liquid, which can achieve smoother and more accurate level gauge readings. Higher Visibility: Clear indicator tube and brass ball provide higher visibility than traditional bubble level, improving measurement efficiency. Plastic Material: The slope indicator tube is made of excellent plastic, crush resistant and scratch resistant, and can be used in various environments. Easy Installation: With adhesive tape for paste installation, including 2 guide holes for screw installation, can be installed inside or outside the RV. 1. Monitoring Range: This indicator can monitor tilt angle of ‑25 to 25 degree, suitable for RV leveling, bed leveling, or woodworking leveling. 2. Accurate Reading: The brass ball is placed in a special damping liquid, which can achieve smoother and more accurate level gauge readings. 3. Higher Visibility: Clear indicator tube and brass ball provide higher visibility than traditional bubble level, improving measurement efficiency. 4. Plastic Material: The slope indicator tube is made of excellent plastic, crush resistant and scratch resistant, and can be used in various environments. 5. Easy Installation: With adhesive tape for paste installation, including 2 guide holes for screw installation, can be installed inside or outside the RV. Spec: Item Type: Horizontal Micro Angle Tester Material: ABS Application: Suitable for RV Leveling, Bed Leveling, Woodworking Leveling Overall Size: Approx. 127 x 50mm / 5 x 2in Hole Size: Approx. 4.5mm / 0.2in Package List: 1 x Leveler 1 x Adhesive Tape Package List 1 x Leveler 1 x Adhesive Tape