Download images
The images are displayed in the order in which they were tested for comprehension.
- Series collection PNG 3700px x 1800px
- Image 1 PNG 1800px x 1800px
- Image 2 PNG 1800px x 1800px
![This pictograph tells you to never smoke around medical oxygen.](/img/pictographs/22.257x125.png)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
Never smoke where medical oxygen is used.
The images are displayed in the order in which they were tested for comprehension.