6 pack DB9 male to female adapter . This adapter has 120ohm Resistance inside CAN bus DB9 120 ohm terminal resistance, with 120 ohm resistance built-in high-precision between p2 and p7 120ohm DB9 Male to female adapter, plugged directly into the DB9 port of the any bus analyzer, without changing the existing cable This db9 adaper uses excellent quality and high temperature resistance.It is calculated in accordance with CAN chip communication parameters. one side is db9 male ,and the other side is the db9 female.This DB9 adapter has 120ohm inside ,and it can work much steady 6-Pack RS323 Serial DB9 Male to Female Connector Adatper CAN Bus Terminal Resistance Terminator with 120ohm Resistance