THE ORIGINAL INCLINOMETER - Since 1971, Lev-o-gage has been the industry leader in durable, high-visibility inclinometer levels. This is the industrial version of the Sr. version of Lev-o-gage, showing Percent Slope. PRECISE RANGE - Industrial grade inclinometer displays a range of -100% - +100%, allowing you to measure precisely and efficiently. EASY-TO-READ DISPLAY - Engraved and hand painted numerals and hashmarks are extremely durable. Large enough for an easy and accurate reading. HIGH VISIBILITY - Features a high-visibility Saturn Yellow tube assembly with special damping fluid that works down to -40 degrees F/ -40 degrees C. Fully-enclosed housing protects glass tube assembly for long time durability and usage. MOUNTING TAPE INCLUDED - Comes with 3M Brand VHB (Very High Bond) pressure-sensitive adhesive foam tape on back for easy mounting. The Lev-o-gage Sr. (Percent Slope Model) is a large gauge (6.44" wide) that displays a slope range of -100% to +100%. It features a high-visibility Saturn Yellow tube assembly with special damping fluid that works down to -40 degrees F/-40 degrees C. Fully-enclosed housing protects glass tube assembly. Pressure-sensitive adhesive foam tape is included on the back for easy mounting.