Summary I love the shape of these vintage erasers. When I saw a whole bag of them for only 99 cents at Office Depot, I had this idea for a little office toy. 3D printing fanatics, here is my gift to you. All the instructions for this project are on instructables : http://www.instructables.com/id/Eraser-ball-3DP/ Instructions All the instructions for this project are on instructables : http://www.instructables.com/id/Eraser-ball-3DP/ Somehow, the model exported in inches, so you might have to scale it by 25.4