Northwest Instrument NSLP100B 20x Builders Level Pkg. • 20x Builders Level Pkg. • Magnification: 20x, with Stadia ratio (1:100) • Graduation: 1 • Working Range 200ft • Leveling Accuracy: 1/4 in @ 100 ft • Minimum Focus: 3.5 ft • Objective Aperture 22 mm • Sensitivity of Plate Vial: 8"/2 mm • Includes: NSL100B level, NAT83 Contractors Tripod, NAR09E Aluminum Rod, Carrying Case, Plumb Bob and Manual • Tripod Adaptor: 5/8 x 11 thread