DB9 Male to Male Mini Null Modem Data Transfer Adapter/Gender Changer , AD-N05M

Adapter Female to Female Connector Gender Changer F/F Radio Shack

DB25 Female/Female Null Modem Adapter (Beige)

DB9 DB 9 RS-232 Female To Female Mini Gender Changer F/F Adapter Connector

9 Pin RS-232 DB9 Male to Male M/M Serial Cable Gender Changer Coupler Adapter

9 Pin RS-232 DB9 Female to Female F Serial Cable Gender Changer Coupler Adapter

StarTech NM9MM DB9 RS232 Serial Null Modem Adapter- M/M 1 x DB-9 Male - 1 x DB-9

Gender Changer DB25 DB-25 Female/Female F/F FF (USA)