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Nitrile Rubber O Ring 70mm OD 2.5mm Width Round Sealing Washer Sealing Gasket Ring Faucet O-Ring Black Pack of 50: Amazon.com: Tools & Home Improvement
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Cool White LED Ring Light PCB - 70mm Diameter - 5V Power : ID 5138 : $8.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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