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3/4" OD X .125" Wall X 48" Length Aluminum Tube Round 6061-T6 | eBay
6061T6 TUBE 3/4" X 3/4" X .049 from Aircraft Spruce Europe
Amazon.com: Pipes and Accessories 1Pcs 19mm-39mm Inner Diameter Aluminum Tube Alloy Hollow Rod Hard Bolt Pipe Duct Vessel 100mm Length 41mm OD Easy to use and Durable (Specification : 41mm(OD) x39mm(ID)) :