Exquisite design, stamping scale forms a concave on the surface of ruler body, which is wear-resistant and durable. The ruler surface is calibrated by laser engraving, and the reading is clear and clear. The whole body is with aluminum alloy, which is light and convenient with clear scale. The steel rule is very convenient to use. You will receive a 90-degree triangular ruler, which can meet your . describe: Name: English 90-degree triangle ruler Specification: English system Material: aluminum alloy colour: black Package Contents: 1 x Triangular ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.