YCS basics 50 Foot DB9 9 Pin Serial / RS232 Male/Female Extension Cable

SIENOC 5pcs 9 Pin RS-232 DB9 Male to Male 5pcs Female to Female Serial Cable Gender Changer Coupler Adapter Pack of 10

DB9 Null Modem Adapter Male to Female Slimline Data Transfer Serial Port Adapter 5 Pack

DB9 null modem male to female slimline data transfer serial port adapter 2 Pack

Your Cable Store 25 Foot DB9 9 Pin Serial Extension Cable RS232

Your Cable Store 25 Foot DB9 9 Pin Serial Port Null Modem Cable Female/Female RS232

DB9 null modem female to female slimline data transfer serial port adapter 2 Pack

C2G 02781 DB9 F/F Serial RS232 Mini Gender Changer/Coupler, Nickel

Top-Longer 9 Pin DB9 Female to Female/Male to Male Mini Gender Changer Coupler Adapter Connector Pack of 4

StarTech.com DB9 to DB25 Serial Cable Adapter - F/M (AT925FM)

50 Foot DB9 Male to Female RS232 Extension Serial Cable - 28 AWG Shielded