Feature 1Application: The cable is used to connect to all 9 pin diagnostic connectors in cab and connect to all 6 pin diagnostic connectors in cab. 2Reference OE Number: The part numbers for reference are 121891, 121721, please confirm whether it is consistent with the OE you need. 3Stable Transmission: This diagnostic connector is used to replace old, cracked or tired data cable to ensure safe and stable transmission. 4Premium Material: Truck adapter cord is made of ABS and rubber material, sturdy, strong tensile strength, not easy to break, and durable. 5Safe and Reliable: With elaborate manufacturing technology, the adapter cord has high performance, do not need to change frequently.Item Type:SplitDiagnosticCableMaterial: Rubber + ABSNumber of Pins for Female Connector: 6 PinsNumber of Pins for Female Connector: 9 PinsNumber of Male Connector Pins: 26 PinsOE: 121891, 121721 Application: Connects to all 9 pin diagnostic connectors in cab and Connects to all 6 pin diagnostic connectors in cabFor OE 121891-TC: 9 Pin J1939 Type 2 with Tri CAN Communication which connects to all class 7-8 Vehicles including for Freightliner body controllers. The recommended for DataLink connector can supply SAE J1587 J1708 and J1939 communications and the battery voltage. Connects to all 9 pin diagnostic connectors in cab.For OE 121721: 6 Pin specifically recommended for SAE J1708 connections and supply the battery voltage. Connects to all 6 pin diagnostic connectors in cab. Works on most 2005 or older vehicles. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x SplitDiagnosticCableNote1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!