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BrassCraft 1/2-in x 3/8-in Threaded Adapter Bushing Fitting in the Brass Fittings department at Lowes.com
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Amazon.com: KOOTANS 1/2 NPT x 3/8 NPT Male Solid Brass Hex Nipples, Heavy Brass Pipe Adapter Fittings Reducing Nipple Connectors 4Pieces : Industrial & Scientific
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YOUHO Delta Faucet 1/2 Female Pipe Thread by 3/8 Male Compression Brass Adapter, G3/8 to G1/2 pipe adapter 2 Piece Suitable for newer Kohler faucet - - Amazon.com
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