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Amazon.com: SUPPLY GIANT HNDQ0312 3-1/2" Galvanized Malleable Iron Pipe Cap for 150 lb Applications, with Female Thread, 3-1/2 in, Gray : Industrial & Scientific
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Anvil 8700132650, Malleable Iron Pipe Fitting, Cap, 1/2" NPT Female, Galvanized Finish: Amazon.com: Tools & Home Improvement
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