Features: There are 3 sizes, 20/30/40cm, selecting based on your needs. Protruding protective plate can effectively avoid injury caused by accidental jump of the cutter during cutting. Draw line anti-seepage ink structure can avoid ink penetration caused by line ink, which is for high performance. Made of aluminum alloy in high quality, which makes itself getting great popularity. Suitable for length measurement, straight line cutting, home use, DIY production, etc. Specifications: Material: Aluminum Alloy Type: 20/30/40cm(optional) 20cm length: 21cm/8.26in 30cm length: 31cm/12.2in 40cm length: 46cm/18.11in Package Includes: 1X Cutting Ruler note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.