emerald
thingiverse
This is a personalized rendition of the model found at http://www.thingiverse.com/thing:279654, created using the Customizer tool (http://www.thingiverse.com/apps/customizer/run?thing_id=279654). To produce your unique version, adjust these parameters: square ratio to 1.5, wall thickness to 7, and thickness to 15; set outer radius to 64, knob radius to 23, and bolt radius to 2.9.
Download Model from thingiverse
With this file you will be able to print emerald with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on emerald.