in : Abundant can satisfy your use and replacement requirements in Long Time Usage: the straight edge ruler is made of quality stainless steel material, strong and sturdy enough, not easy to rust or corrode, which can withstand bad weather conditions and you for a long time Sophisticated Design: sides of metal ruler are with no ; One end is straight, the other is arced with a hole which makes it easy for hanging, convenient to Accurate Marking: with numbers printed clearly, stainless steel office ruler marks inch and centimeter measurements respectively, so you can measure objects accurately and precisely, providing you with a comfortable using experience Widely Applicable: the geometric ruler is suitable , school, office; It can be applied for carpentry, engineering, architects, or as a drawing ruler, measuring device and so on color:Silver Material:Stainless steel size: 30cm / 15cm Package Contents: 32 x stainless steel rulers (in 2 sizes, 16 pieces for each size) 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.