An Apollo Command Module LiOH Filter Assembly, 7.25 x 7.25 x 5.25, bearing an affixed label with embossed part specifications, headed “Absorber Element” and noting “Ref. Spec. ME901-0218-0051.” The side is stenciled with red and yellow text: “Ground Test Only.” In very good condition, with soiling or corrosion to the sides and a tear to the affixed tag obliterating the part and serial numbers. This piece of equipment would be utilized in conjunction with the Apollo Command Module Environmental Control Unit (ECU) to remove carbon dioxide and to filter particulate from the atmosphere.