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USB Type C to DB-9 Adapter Cable - 1.5m long : ID 5446 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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StarTech.com USB to Serial Adapter - Detachable 6 ft USB A-B Cable - Prolific PL-2303 - USB to RS232 Adapter Cable - Add an RS232 serial port to your laptop or desktop
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