It's 190mm in length, use to connect pixhawk.
DF13 connectors allow for a strong, secure connection between components, but require special instructions for handling to avoid damage to the wires and connectors.
To remove a DF13 connector, lift the edges of the connector carefully away from the pod until they pop out, then remove the connector. Don’t pull on the wires! The connector can break easily if force is used to remove it.