This sinus endoscopy 4 times full-size representation of the nasal cavities with internal carotid artery and optic nerve. The middle turbinate is detachable, exposing the partially dissected uncinate, infundibulum, and ethmoid bulla in the sinus endoscopy trainer. The bulla has been perforated to demonstrate the endoscopic pathway to the ethmoid cells. Sinus endoscopy trainer on stand. English labeling.