Deli Multi Color Yocoo Flexible Ruler 20″ cm. Very elastic, unbreakable rulers. Available in sizes: 20 cm. Environmental protection, Ideal for school & technical drawing. Use best stationery at work or school. Available in the colors (Mix) Green, Blue and Pink. Size: 20 cm. Used for Decimal and fractional measurement number. Color: Multi Colors. 1 Piece ruler in pack.