Carbon fiber ruler - Lishang carbon fiber ruler, made of pure imported carbon fiber material, has the advantages of not easy to deform, light, good toughness, clear scale, etc., and is very durable. The carbon fiber ruler is based on a precise ruler of straight-line rhombus. It is durable and widely used in mathematics, measurement, engineering and other disciplines. Various lengths, scales of various national standards, and various shapes can be customized according to customer requirements.