ITEM NAME:9 Pin Male To OBDII 16 Pin Adapter Connector Cable for Heavy Truck Description: - HD16-9-1939S-P80 GREEN 9 pin plug with locking ring - this connects to your factory connector located in vehicle. - You must have the BLACK or GREEN round 9 pin diagnostic in dash to connect this side, works on both GREEN and BLACK. - These are the locking ring type connectors not the smooth slide on - this insures that the connector stays connected. - Other end has J1962F Female 16 pin OBD2 type connector (this is the same connector that is mounted under dash in passenger vehicles). - This connects to your device such as ELD, scanner, telematics, GPS tracker and so on. Specification: - Material: Metal+Plastic - Size:(Approx).150mm/6 Inch Package Included: 1 Pieces OBD II Adapter Diagnostic Cable.HD16-9-1939S-P80 GREEN 9 pin plug with locking ring - this connects to your factory connector located in vehicle. - These are the locking ring type connectors not the smooth slide on - this insures that the connector stays connected.