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uxcell Flared Tube Fitting Union G1/4 x 6mm Tube OD Reusable Hydraulic Straight Hose End Male Fittings 2pcs - Amazon.com
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6mm Tee Push-in Fitting Stainless Steel FKM | Tameson.com
Straight Pneumatic Push to Quick Connect Fittings Bulkhead Union 6mm Tube OD - Silver Tone,Black - Bed Bath & Beyond - 29791864