13mm earplug
thingiverse
A personalized version of the item available at http://www.thingiverse.com/thing:44815 was created using the Customizer tool (http://www.thingiverse.com/apps/customizer/run?thing_id=44815). For this design, type 1 was selected, cursor at 100, a diameter of 13, a weight of 10, a margin of 0.1, and 50 faces ($fn). Additionally, a groove is included with an edge thickness of 0.6.
Download Model from thingiverse
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