♥ Beryllium Copper Material. The ruler is made of exquisite copper material, which is not easy to rust in daily use, and the hand feel is very good when drawing and measuring. ♥ Measurement Range. The scale can measure from 150mm or 5.87 inches. ♥ Refined Processing. Both sides of the ruler are treated with a fine wire drawing process. The design is simple and elegant, the texture is delicate, and the appearance is exquisite. ♥ Scope of Application. The ruler is designed for professional students, engineers, and teachers. It is also suitable for non-professionals. ♥ Medium Thickness. The ruler is about 1.5 mm thick and won't easily scratch your hand, enough to be a beautiful bookmark for books., Manufacturer: Hztyyier