... mark 3. non-smell 4. air tightness Anesthesia Mask 0#Anesthesia Mask is made medical materials, innoxious, odorless with favorable transparence. ... tightness.This device can be connected with multiple medical equipment such as anesthesia machines, ventilators, oxygen- machines, hyperbaric oxygen ... adult122mm ID,inflatable2005401150size 5#, large adult122mm ID,inflatable200 Medical Anesthesia Mask 0#