Fitment: Replacement for Paccar diagnostic port, fit for Cummins Inline 5, for Cummins Inline 6, for Noregon, for Dearborn, for Bosch, and for Nexiq data link adapters. Usage: You can use this feedthrough adapter to connect a Bit 9 pin Eld or any other J1939 II compatible device to the truck diagnostic port. Characteristic: This adapter has straight through electrical continuity. It allows to use the old diagnostic cable with the black end to connect to the newer J1939 Type II green connector in the cab. 9 Pin Connector: This adapter will allow you to use your interface with 9 Pin adapter to connect to trucks with the Deutsch green 9 pin Type II connector on newer heavy duty trucks. Great Choice: If you have a new vehicle with a Green 9 Pin connector in the cab but still want to use your old single Can datalink adapter, this is the connector for you.