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Amazon.com: Legines Brass Compression Tube Fitting, Comp Union Coupling Assortment Kit 1/8", 3/16", 1/4", 5/16", 3/8" & 1/2" 6 Sizes (22 Pcs) : Industrial & Scientific
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LTWFITTING 3/8-Inch OD x 1/4-Inch OD Compression Reducing Union,Brass Compression Fitting(Pack of 5) - Compression Fitting Ferrules - Amazon.com
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BrassCraft 1/4-in x 1/4-in Compression Reducing Union Coupling Fitting in the Brass Fittings department at Lowes.com
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Proline Series 1/2-in x 1/2-in Compression Coupling Union Fitting in the Brass Fittings department at Lowes.com
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Uxcell 1/4" 6.35mm Tube OD Brass Compression Sleeves Ferrules 40 Pcs Brass Ferrule Fittings Compression Fitting Kit - Walmart.com
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