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1PC 5ft F/F Serial RS232 Null Modem Cable Female to Female DB9 FTA Cross Connection 9 Pin COM Data Cable Converter PC Accessory|Computer Cables & Connectors| - AliExpress
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6ft (1.8m) DB9 F/F Serial RS232 Null Modem Cable - Black | Serial RS232 | Computer Cables | USB and PC
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DB9 RS232 Serial Cable Male to Female Extension Null Modem Cord Cross TX RX line for Data Communication 15 Feet Black - Newegg.com
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