Modular Test Tube Rack

This is a completely modular test tube rack. You have the ability to change the racks height, the diameter of the holes, and the amount of tubes it can hold. The main advantage of this design is the ability for it to fit every size of test tube, and any amount of tubes thus eliminating the need to dig for a particular size of test tube rack. Tube racks of similar size go anywhere from $10 for smaller ones to over $60+ for the larger ones. The cost of printing one of these customized racks is for