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Steelworks 1-1/2-in x 3-ft Zinc-Plated Steel Perforated Square Tube in the Tubes department at Lowes.com
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Amazon.com: 2 inch Square Tubing Steel Square Tube 50mm x 50mm x 110.24 inch / 2800mm Length Wall Thickness 2mm, 1 Pack 2" 50mm Hot Rolled ASTM A-36 Steel Square Tubing from
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10' Long x 2" x 2" Square Galvanized Steel Tubing (0.0625" Wall) - Square Steel Pipe | Square Fence Fittings
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Stainless Steel 316 2-Way Structural Fitting Handrail Connector 90° for (16 Gauge, 1.5mm) Square Tubing – Top Hardware
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Hillman 1/2-in x 3-ft Plain Hot Rolled Steel Weldable Square Tube in the Tubes department at Lowes.com
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