Onilu Brass Flare Union 1/2 Flare X 1/2 with Nut

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Brass Flare Union 1/4 OD x 1/4 OD SAE 45 Degree Flared Tube Fitting, 5pcs

Everbilt 1/2 in. Flare Brass Coupling Fitting 801279 - The Home Depot

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Everbilt 1/2 in. Flare x 1/2 in. FIP Brass Adapter Fitting 801359 - The Home Depot

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Breezliy 1/2 Inch Male Flare x 1/2 Inch Male Flare Connector Gas Adapter Union BrassTube Coupler Pipe Flare Fitting (2PCS)