THE ORIGINAL INCLINOMETER - Since 1971, Lev-o-gage has been the industry leader in durable, high-visibility inclinometer levels. One of the must-have accessories for offroad 4x4 vehicles, ATV's, trucks, travel trailers, boats, tractor, and anything else that tilts. EASY TO READ DISPLAY - Monitors tilt from -45 to 45 degrees with high-visibility brass ball and bright Saturn yellow tube assembly. Engraved and hand painted numbers make for a functional, easy-to-read clinometer. SHATTERPROOF DESIGN - Tube assembly is made out of a rugged copolymer "flex tube" for ultimate durability. Brass ball rides in special damping fluid for smooth, accurate readings. MOUNTS WITH 3M VHB TAPE - Lev-o-gage includes a piece of 3M VHB (Very-High Bond) tape on the back for easy mounting. Can be mounted on the inside or outside of vehicle for easy leveling. MADE IN USA - From the highest quality materials. Safely and accurately measure angle or slope in a variety of applications.