A chassis base for small robots, able to fit most arduino boards and similar and it's designed to fit Micro Metal Gearmotors and Encoders.The dimensions of the chassis are: 122x109.68x1.2mm Depending on the slicer configuration, the chassis thickness, should accomodate most hotend nozzles, 0.2, 0.3, 0.4 and even 0.35mm (rounding the thickness to 1.05mm). The mounting holes are a fit for the Micro Metal Gearmotors with or without the Encoders (http://www.pololu.com/category/60/micro-metal-gearmotors). Moreover the mounting holes, should allow the fitting of most Arduino boards or similar.