For all of your measuring needs, this Multifunctional Function Geometric Ruler is an accurate and dependable instrument. It is made of soft materials, with rounded edges and unbreakable features that do not hurt your fingers accidentally. Also, you can easily fold and unfold the ruler. Perfect for use by professionals or students.

Drawn include:

• Stereogram
• Answer sheet
• Function diagram
• Wavy lines and straight lines

Please noted that prevent this ruler from high temperatures. Otherwise, the ruler will warp which affects measurement accuracy.

Size: 115 mm × 190 mm / 4.5 inch × 7.5 inch