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John Guest Acetal Copolymer Tube Fitting, Flat End Adaptor, 3/8" Tube OD x 1/2" BSP Female (Pack of 10): Push To Connect Tube Fittings: Amazon.com: Industrial & Scientific
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Ideal H2O JG Quick Connect Reducer Fitting - Union - 3/8 in to 1/2 in - White (10/Bag) - Pipe Fittings - Amazon.com
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