stainless steel ruler 1.Material: stainless steel / carbon fiber steel 2.Size: 6", 12", 15", 24'', 39" 3.Thickness:0.5mm, 0.7 Stainless steel ruler1.Material: stainless steel / carbon fiber steel2.Size: 6", 12", 15", 24'', 39" (width and thickness can be done as the customer's requirement)3.Thickness:0.5mm, 0.7mm4.Precision manufacture,5.Clear markings6.Metric and Inch system(or just one metric / ...