25.02.2007, Hamburg, Hamburg, Germany - Ruler with water level. (tools, ruler, water level, water-level, water, level, spirit level, spirit-level, precision, precise, measurement, measuring, measure, length, closeup, close-up, close up, studio shot, nobody, vertical) 00W070225D058CAROE.JPG [MODEL RELEASE: NOT APPLICABLE, PROPERTY RELEASE: NOT APPLICABLE (c) caro images / Westermann, http://www.caro-images.com, [email protected] - In case of using the picture for any non-editorial purpose, please contact the agency - the picture is subject to royalty!]