Specification:  

Material: plastic
Scale Length: 30cm/12"
Total Length: about 32cm/12.6"
3 Color Coded Sides: 1:100 1:300 1:200 1:400 1:250 1:500

                                                                         Clearly marked metric graduations.
                                                                3 color coded sides, each side with different scales.
                                                  6 scales allow precision drawing for architects, engineers and carpenters.
                                                    Package included:
                                                                                    1x Triangular Metric Scale Ruler
Note:
Please allow 1-2cm errors due to manual measurement
Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same
Notes:
We will check the products carefully before shipping. 
After receiving the item, if you have any questions, please write to me, please do not leave negative feedback and low scores, and do not open CASE, I will try my best to help you solve the problem, as a seller, we will be responsible for everything. 
Contact us:
If you need any type of item, please contact us via eBay messaging service. We will respond to you very promptly. At our store, we make every effort to ensure that every buyer's experience is as valuable and enjoyable as possible. 
You can buy with confidence knowing you're getting a worry-free deal!