ALUMINIUM LEVEL 1.Measuring error rate below 0.1% 2.Super magnetic double magnetism 3.Exoxy coating,easy to clean,elegant ALUMINIUM LEVEL1.Measuring error rate below 0.1%2.Super magnetic double magnetism3.Exoxy coating,easy to clean,elegant4.Precision clear large bulb,high measuring precisionSIZE: 400.500.600.800.1000mm ALUMINIUM LEVEL