Made of .024 light gauge plastic. Will last for years. Metric Scale For use in photographing small artifacts. 2cm wide. Comes in various lengths - 5cm, 10cm or 25cm 5cm scale shown. See below to purchase 10cm or 25cm scales. Small Black and White Photo Scales PS5$1.20, 12/$10.20 10CM Black and White Photo ScalesSame features as above. 2cm x 10cm. PS10$1.30, 12/$11.40 25CM Black and White Photo ScaleSame features as above. 2cm x 25cm. PS25$1.95, 12/$18.00 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.