Where can identification information typically be found on a DOT cylinder?

Identification information on a DOT (Department of Transportation) cylinder is typically found on the collar. The collar of the cylinder serves an important purpose as it is a specific area designed to hold vital information, such as the cylinder's serial number, manufacturer details, and compliance information related to safety and transportation regulations.

This information is critical for ensuring that the cylinder meets all safety and quality standards required for the transport and storage of gases. Proper identification helps in tracking the service history of the cylinder, ensuring it is inspected and maintained in accordance with regulatory requirements.

The other options may contain additional information, but the collar is the designated area for the identification that is most frequently referenced in association with DOT regulations.