This is an oxygen mask made by M.C. Medical for oxygen supply. ■ Manufacturer: M.C. Medical ■ Product Features: The edge of the mask is folded over the bridge of the nose, making it gentle on the skin and improving the fit. The oxygen tube uses a star lumen structure that is less likely to become blocked. It is non-latex, reducing the risk of allergies. ■ Product Specifications: Code: 24-7561-00 Material: PVC Unit: 1 box (contains 20 pieces) This is an unopened box containing 20 pieces.