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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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IMPERIAL 6-in dia Galvanized Steel Crimped Small End Round End Cap in the Duct Caps department at Lowes.com
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Galvanized Cap - Malleable Iron Fittings | IrrigationSupplyParts.com -- Irrigation Fittings, Camlock, Ringlock, Drip Irrigation, Valves, Gauges
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