The ChrisNik 25-Foot Pipe-Mic II Grade Rod 172510 is designed for use with the ChrisNik Pipe-Mic II. This grade rod along with the Pipe-Mic II assists construction and surveying professionals in measuring pipe inverts and pipe diameters. There are graduations in feet, tenths, and hundredths of a foot on both sides of this leveling rod. Its rectangular shape consists of six sections that extend to 25 feet and collapse to 5 feet and 6 inches. It also includes a button lock that secures your chosen length. And waterproof, fiberglass construction will keep your grade rod accurate for years to come. A 1-year warranty is included.