The CST/Berger Abney Level with Stadia model 17-645 has a 5x magnification with 1:100 stadia. This level is 7-3/4" long with it's draw tube extending to 8-5/8". Two-inch radius arc graduated to degrees, 0 to 90 degrees in both directions with a vernier reading to 10 minutes. This model also has percent scale of 0 percent to 100 percent in both directions. Comes complete with a cordura belt loop case. A 90 day manufacturers limited warranty is included.