API Test Tube Rack
Description
This is a test-tube rack to hold test-tubes (~5ml) from the API Master Test Kit. You can also easily dry test-tubes by turning them upside-down -- there is a notch at the bottom of the rack that will allow fluids to freely flow out of the bottom. Make sure to print the test-tube holder on its side -- just like it is oriented in the thingi-view simulation above. Comments/suggestions/criticisms all welcome!
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