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StarTech.com USB to Serial Adapter - Null Modem - FTDI USB UART Chip - DB9 (9-pin) - USB to RS232 Adapter - Add a Null Modem RS232 serial port to your laptop
DB9 NULL MODEM ADAPTER Male/Female - Microworx Computer Sales and Service
Null Modem Adapter RS232 DB-25 Male to DB-25 Female
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DB9 Null Modem Slimline Gender Changer Female to Female
Tera Grand DB9 Female-to-Female Mini Null ADP-NULLDB9FF-MINI B&H
Tripp Lite 18in USB to Null Modem Serial Adapter FTDI w/ COM Retention M/F 18" - serial adapter - USB - RS-232 - U209-18N-NULL - USB Adapters - CDW.com