This bulk pack of Classmaster 30cm rulers is perfect for educational use. You can keep things straight with the precision-bevelled edge, ideal for mathematics, art and graphic design use. It's transparent as well to provide a clear view of the page when working: perfect for lining up graphs and text. Each ruler has a dual-unit scale with metric (centimetre/millimetre) and Imperial (1/16th, 1/10th and whole inch) markings. This bulk pack contains 100 rulers.