Description:  84/100/150/200/250mm Precision Level Graduation Bar Measurement Leveler Accuracy 0.02/0.05/0.45mm.     Specification:  Material: cast iron.  Measuring Range: 84/100/150/200/250mm.  Resolution: 0.45mm, 0.02mm.  Accuracy: （0.0045＂/10＂）, (0.0002＂/10＂).  ZT06-06: 84mm: 3.3＂, 0.45mm/m.  ZT06-07: 100mm/4＂, 0.02mm/m.  ZT06-08: 150mm/6＂.  ZT06-09: 200mm/8＂.  ZT06-10: 250mm/10＂.  ZT06-11: 300mm/12＂.     Feature:  -Be made from cast iron, heavy duty and durable.  -Graduated bubble vials.  -Base with V-grooves.  -With a precision ground base for accuracy.  -With wooden case for well storage.  -Precision engineers spirit level for setting and checking the level of machinery and other high accuracy levelling applications.  -It can also be applied to small angle measurements.     Precautions for use:  1. Before measurement, the measurement surface should be carefully cleaned and wiped dry, and check whether the measurement surface has defects such as scratches, rust and burrs.  2. Before measuring, check whether the zero position is correct. If inaccurate, adjust the adjustable level gauge and repair the fixed level gauge.  3. When measuring, avoid the influence of temperature. The liquid in the level has a large influence on the temperature. Therefore, pay attention to the influence of hand heat, direct sunlight, breathing, etc. on the level.  4. During use, read on the vertical level to reduce the influence of parallax on the measurement results.     Package Included:  1 x Precision Spirit Level.  1 x Wooden Case