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3pcs 1/4" 5/16" 3/8" Tube OD x 1/8" 1/4" NPT Brass SAE Flare Fitting Female Connector adapter 45 degree Flare - AliExpress
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Amazon.com: Brass Hose Barb Reducer, 3/8" to 5/16" Barb Hose ID, Reducing Barb Brabed Fittings Splicer Mender Union Air Gas Water Fuel Line Heater Garden Pond Poly Tubing Adapter (Pack of 2) :
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LTWFITTING 5/16 in. ID Hose Barb x 3/8 in. MIP Lead Free Brass Adapter Fitting (5-Pack) HFLF39185605 - The Home Depot
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LTWFITTING 3/8 in. O.D. x 5/16 in. O.D. Brass Compression Reducing Coupling Fitting (25-Pack) HF62R6525 - The Home Depot
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Adapter, QDF 3/8" » 5/16" Barb, Black (QDA-38FHB56CL): EFI Adapters - Quick Connect Female » AN JIC | Racetronix
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LTWFITTING 5/16 in. O.D. Comp x 3/8 in. MIP Brass Compression Adapter Fitting (5-Pack) HF685605 - The Home Depot
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LTWFITTING 5/16 in. O.D. Comp x 3/8 in. MIP Brass Compression Adapter Fitting (5-Pack) HF685605 - The Home Depot
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