Bosch GOL 20 D Professional Optical Level with fast aperture for excellent staff reading. Robust and reliable, ideal for outdoor use due to its robust housing with dust and splash protection (IP54) A compensator lock protects the pendulum against damage and loss of calibration during transportation. Supplied with: 1 x Plumb Bob. 1 x Lens Cover. 1 x Adjusting Pin. 1 x Hex Key. 1 x Carrying Case. Specifications: Unit of Measure: 360 degrees. Magnification: 20 x. Accuracy: +- 3.0mm at 30m. Working Range: 60m. Dust and Splash Protection: IP54. Operating Temperature: -10 - 50°C. Storage Temperature: -20 - 70°C. Tripod Thread: 5/8in. Weight: 1.5kg.