PVC DISPOSABLE OXYGEN MASK
https://www.cn-shengbo.com/product/oxygen-mask-1/sy041-pvc-disposable-oxygen-mask-with-ce-iso13485-fda-certificate.html
Material PVC Specification XL / L / M / S
Feature Transparent Certificate CE / ISO13485 / FDA
Shelf Life 5 Years Application Hospital / Laboratory / Clinic