DISPOSABLE OXYGEN MASK WITH BAG FOR HOSPITAL LABORATORY https://www.cn-shengbo.com/product/oxygen-mask-with-bag/sy040-pvc-pe-disposable-oxygen-mask-with-bag-for-hospital-laboratory.html Item No. & Description SY040 Disposable Oxygen Mask With Bag Material PVC / PE Specification XL / L / M / S Feature Transparent