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1 Port USB 2.0 to Serial Adapter Cable - Serial Cards & Adapters | StarTech.com
Plugable USB to Serial Adapter Compatible with Windows, Mac, Linux (RS-232DB9 DTE Male Connector, Prolific PL2303HX Rev. D Chipset) Wireless Adapters - Newegg.com
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USB 2.0 A-Male to Dual DB9-Male Serial Adapter - Micro Connectors, Inc.
