OXYGEN MASK – MEDIUM CONCENTRATION Soft, transparent, and odor-free vinyl, with metal nose clip and elastic strap for patient comfort and best fit. (Made by soft PVC plastic) SM-053: Nasal oxygen cannula (over ear) with 200cm tubing for adult (made by soft PVC plastic) Detail Three types of nasal tips at choice. (Child-sized nasal tips are also available.) Standard type: SM-053 / SM-053-C (For child) Curved type (Injection molding): SM-053A / SM-053A-C (For child) Curved type (Dipping): SM-053B / SM-053B-C (For child)