Alvin 12" High Impact Plastic Engineer Triangular Scale

Alvin 12" High Impact Plastic Engineer Triangular Scale, these 12" triangular scales are ideal for scholastic and vocational use. Satin finish, high-impact plastic with tapered edges. Sharp, easy-to-read graduations resist wear. White. English and metric. Items 110PC and 111PC are blister-carded. All engineer scales have the following graduations unless otherwise noted: 10, 20, 30, 40, 50, 60 parts to the inch.

12" long, 3-sided professional quality scale rule for engineers. Made from high-impact, non-reflecting plastic. Smooth, tapered edges. Graduations are machine-engraved in 10, 20, 30, 40, 50 and 60 parts per inch.