Amazon.com: DTech DB9 RS232 Serial Cable Male to Female Extension Null Modem Cord Cross TX RX line for Data Communication (10 Feet, Black) : Electronics
StarTech.com 10 ft DB9 RS232 Serial Null Modem Cable F/M - SCNM9FM - Serial Cables - CDW.com
25 ft Cross Wired DB9 Serial Null Modem Cable F/F DB9 Null Modem Cable 65030782661 | eBay
DB9 (f-f)Null Modem Cable, 6ft
Null Modem Cable, DB9 Male to DB9 Female, UL rated, 8 Conductor, 10 foot - Walmart.com
Rocstor USB 2.0 Type-A to RS-232 DB9 Serial Null Modem
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Null Modem Cable, DB9 Male to Female, 6' — Tera Grand