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.

123D link : http://www.123dapp.com/AssetManager/Publisher?stgAction=getProduct&intProductId=597788
Thingiverse link : http://www.thingiverse.com/thing:17992

Step 1: STL Model

You will first need to download this .STL file, and send it to print.

eraser_ball.stl
Download View in 3D

Step 2: Find a 3D Printer

I used an UP! 3D printer and it worked very well. It took me a while to optimise it, but I'll post that in an other Instructable.

Step 3: 3D Print

I used White ABS with normal definition. I suppose that PLA would also work fine.

Step 4: Clean

If you used a RepRap 3D printer, you will need to remove the support plastic with tweezers or needle-noze pliers.You might also want to use sandpaper to remove the rough texture.

Step 5: What You Need

Once you have the core, get 14 eraser tips. They come in many colors, so you have the choice!

Step 6: Shine

If you want to be fancy and have a shiny surface, you can use a little bit of acetone. Be careful because it actually melts the plastic so use a brush (real hair because synthetic ones will also melt). If you put to much acetone on the little harms, they will shrink and the tolerances will change.