GRUMMAN APOLLO LUNAR MODULE LANDING GEAR COMPONENT.
SECONDARY LANDING LEG STRUT.
Made from aluminum alloy, with titanium fittings and fasteners. 4 feet 10 inches in length, 4½ inches in diameter. Part number: "TM320M51578-1 RR-67751 SN-9".
Provenance: Property of an institution.
The second largest part of the Lunar Module landing gear. The secondary struts support the primary struts, and resist longitudinal compression.