StarTech.com USB C to Serial Adapter Cable 16in - COM Retention - USB Type-C to RS232 DB9 Converter - ICUSB232PROC - Serial Cables - CDW.com
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Tripp Lite Keyspan High Speed USB C to Serial Adapter DB9 3ft USB Cable TAA (USA-19HS-C) - Newegg.com
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Amazon.com: CableCreation USB C to RS232 Serial Adapter with PL2303 Chip 10 Feet, USB DB9 Converter Cable Thunderbolt 3 Port Compatible with MacBook Pro, XPS 13, XPS 15, Surface Pro, Windows, Linux,
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