Gasket, Lithium Hydroxide Canister, Command Module, Apollo 11


Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

Twenty lithium hydroxide canisters were provided on the Apollo 11 command module for sequential insertion into the Environmental Control System (ECS) apparatus. The canisters were designed to maintain a pure-oxygen environment within the Apollo spacecraft by filtering out carbon dioxide, odors, and debris. During the processes of installation and removal into the ECS a rubber shim was attached to the canister. This unused shim was returned and transferred to the Smithsonian in 1970.

Collection Item Long Description:

Inventory Number


Credit Line

Transferred from the National Aeronautics and Space

Country of Origin

United States of America


  • Rubber
  • Paint


  • 3-D: 17.8 x 17.8 x 0.6cm (7 x 7 x 1/4 in.)
  • Other (Center Hole): 2in. (5.1cm)

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


SPACECRAFT-Manned-Life Support