Eppendorf tube holder customizable

The simple holder to organize small Eppendorf tubes. The rack can hold standard 1.5 and 2 ml Eppendorf tubes. You can quickly adjust for any number of the tube you need. Also, you can choose the distance between the Eppendorf tubes to make them stand tight or rarer. It is possible to add a skirt for stability and change the height of the rack. You could generate any sizes grid, or you can download one of the sample files I've included.