The Acme United Westcott KleenEarth Recycled Rules is made from eco-friendly plastic with packaging made from post-consumer recycled materials. One side of this clear ruler features 1/16" graduations while the other side has a metric measuring scale. This ruler also has a double bevel with a pencil groove and storage holes so you can keep it in a three-ring binder. | Acme United Westcott KleenEarth Recycled Plastic Ruler (ACM41015) - Black