Apollo in-cabin oxygen hose assembly for the A7L space suit, measuring 74.5″ long, featuring two flexible white rubber hoses with 1″-diameter Air Lock connectors for the A7L space suit at one end, terminating in a single 2.75″ coupler, with each connector marked "L." The thick rubber connector at the coupler end is marked on one side with the manufacturer's info, "R. E. Darling Co., Inc., Mfd 67, U.S.," and on the other with the part information, "Hose Umbilical, NAA PN V36-601201-81, REDAR A10521-18." In fine condition, with the blue anodized finish of one connector faded away. The A7L suits consisted of an inner Pressure Garment Assembly (PGA) that was pressurized with oxygen for breathing, and an outer Integrated Thermal Micrometeoroid Garment (I/TMG) that protected the astronaut from temperature extremes and hypervelocity micrometeoroid punctures while on the lunar surface. Connectors for the primary and back-up oxygen supply, electrical supply, and water for space suit cooling were on the front torso area of the A7L suit.
