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Amazon.com: OD 12mm Seamless Steel Pipe Tube Steel Hydraulic, Alloy Precision Steel Tubes, Home DIY Metal Pipes, 1pcs (Color : OD-12mm-800mm-long, Size : ID-6mm) : Industrial & Scientific
uxcell 1/2"(12mm) Soft Silicone Bending Insert Tube for Rigid Tubing 3.3ft Clear: Amazon.com: Industrial & Scientific
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LC GLASS 12 Inch Long PYREX GLASS TUBES 6 Pieces 12mm OD 8mm ID 2 Wall
uxcell 304 Stainless Steel Round Tube 12mm OD 0.5mm Wall Thickness 300mm Length 2 Pcs
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