1Adopting high quality silica gel material, which is soft, non-toxic and safe to use. 2The shape is consistent with the throat contour, minimizing the stimulation to patients. 3The information is printed on the laryngeal mask clearly, easy to check and choose. 43 different kinds laryngeal mask for you to choose, meet your different need. 5For patients under anesthesia or drug sedation and patients who need emergency ventilation support during resuscitation.