#NASA: "Based on the examination, the agency determined the debris to be a stanchion from the NASA flight support equipment used to mount the batteries on the cargo pallet. The object is made of the metal alloy Inconel, weighs 1.6 pounds, is 4 inches in height and 1.6 inches in diameter
https://blogs.nasa.gov/spacestation/2024/04/15/nasa-completes-analysis-of-recovered-space-object/