Specification: 100% brand new with high quality Symbol: Mg High Purity: 99.99% Diameter: Approx.16mm/0.63in Length: Approx. 9cm/3.54in Note:1. High purity magnesium rod in the air for a long time, the surface will be oxidized to darken, in the humid air speed will be faster. 2. Please allow minor error due to manual measurement. 3. The colors may be a little difference for the different monitor display.