1. Made of non-toxic medical-grade Silicone,transparent,soft and smooth      

2. X-ray opaque line through the whole tube        

3. The main tube is reinforced with stainless steel spring to prevent crushing kinking 

4. Available with murphy eye only.    

5. High volume and low pressure cuff for choice    

6. It is short term use, invasive device, contact the catarrh of laryngeal and trachea.