The fit open source parametric gel box - make any size and from any anrylic sheet with your laser cutter. Follow the detailed documentation on DocuBricks: ( It can be customised online via the Ohape design (explained in detail on DocuBricks). Gel electrophoresis systems are one of the most common tools of scientists working with DNA in experiments. Yet existing commercial solutio are expeive and non-customizable. Gel electrophoresis systems do not follow many standards so with the open source parametric system presented here, there is nothing that stops you from building a gel system in the size that most suits your needs - for a fraction of the prize of a commercial system. This gel system was designed to be of research grade quality, safe, easy to build and easy to modify. This documentation contai cotruction files for building a small gel electrophoresis system with a gel size of 100x70mm and two comb slots. This documentation also explai how to customise the online design around 10 main and 7 minor paramete (without italling any software) and how to easily download and make the modified gel box. The virtual gel box automatically adapts to the parameter changes. Besides changing paramete like the gel size and number of comb slots and comb teeth, you can also change the sheet thickness of the acrylic sheet you use for laser cutting, to account for regional availabilities and differences in manufacturing tolerances. The electrophoresis system described here also adapts the buffer volume of the tank according to the gel size you choose. This works well from very small to very large gel sizes up to 500 square centimetres, for larger industrial sized gels you might need less buffer than estimated by my algorithm.