About this 3D model

Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. And I want to recommend you a very powerful 3D modelling software: ?DesignSpark Mechanical. It is Spaceclaim based and freely offered by RS-Components! The file as format-obj was also converted by DesignSpark Mechanical and also uploaded. You can download the free software from: http://www.designspark.com/mechanical