Customized version of http://www.thingiverse.com/thing:308109

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=308109

Using the following options:

layer_height = 0.4
shape = 0
ring_hole = 4.5
image_file = keychain-customizable-lithopane-mark1-420140805-6914-19tis3o-0.dat
tag_size = 50
boarder_thick = 4
boarder_width = 2
number_of_layers = 12