Constructed Of Plastic With Beveled Edges That Make It Great For Working With Ink. Features A Zero Centering Scale And Is Laminated For Durability. This Transparent Ruler Has Edges Calibrated In 16Ths To The Inch. This Package Contains One 18 Inch Plastic Ruler. Imported. Warning: This Product Can Expose You To Chemicals Including Di(2-Ethylhexyl) Phthalate (Dehp), Which Is Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm For More Information Go To Www.P65Warnings.Ca.Gov