Bosch GOL 20 D + BT 160 + GR 500 Optical Level Set Extremely robust - ideal for outdoor use The Bosch GOL 20 D Professional optical level is robust, reliable and ideal for outdoor use. Due to its robust housing with dust and splash protection (IP54) it is perfect for daily and prolonged use. It offers fast aperture for excellent staff reading and a target collimator for rough alignment. The compensator lock makes for safe transport and the penta prism makes it incredibly easy for the user to read the red circular vial. It boasts erect image and a large focusing knob for easy alignment as well as friction-braked rotation. FEATURES Target collimator for rough alignment Penta prism makes it easy to read the circular vial Large focusing knob for easy alignment Fast aperture for a sharp image of the target (measuring rod) Endless degree/angle setting using knobs with friction-braked rotation Ideal for outdoor use due to a robust housing with dust and splash protection (IP54) Fast aperture for excellent staff reading Compensator lock for safe transport SPECIFICATION Unit of Measure: 360 degrees Magnification: 20 x Accuracy: 3 mm at 30 m Working Range: up to 60 m Dust and Splash Protection: IP 54 Operating Temperature: -10 – 50 °C Storage Temperature: -20 – 70 °C