The cannula implantation system is an accepted method of acute and chronic intracranial drug administration for animal experiment. Our cannula system includes guide cannula, dummy cannula, internal cannula and fixing screw. Together with our stereotaxic instruments, holders, fixing screws, PE cannulas, injection pumps and other related products, this system provide a set of simple and effective experimental tool of unilateral intracranial administration for neuroscientists. More importantly, we offer users can customized cannulas based on their specific experimental requirements.