We work precise and try to get as close to the wished for measurements as possible but have experienced the following dimensional tolerances: FDM +-0.2 to +- 1.0 mm SLA  +-0.2mm SLS  +-0.25mm Polyjet +-0.1mm Tolerances may vary depending on details and design. We recommend keeping these tolerances in mind when drawing new models. The plastics shrink slightly after completion of the printing process. While this was taken into account and the production programs have been adjusted accordingly, we can not guarantee a 100% exact outcome.