Amazon.com: Boltmaster Aluminum Tube 3/4" Odx3' L 0.047 " T Mill Bulk : Industrial & Scientific
Amazon.com: Fine aluminum tube 3mm-10mm OD X0.3mm thickness, 300mm length seamless round tube, hollow aluminum tube 3 pieces-3MM outer diameter X 2.4mm inner diameter X thickness 0.3mm : Everything Else
Amazon.com: METALLIXITY 304 Stainless Steel Tube (8mm OD x 1mm Wall T x 250mm L) 2Pcs, Straight Tubing - for Home Furnishing, Machinery : Industrial & Scientific
Stainless Steel Pipe Diameter 25-89 mm x 1000 mm (1 m) V2A Exhaust Pipe Round Pipe 1.4301 (Diameter 50 mm) : Amazon.de: Automotive