HPE X712 Back To Front JG553-61001-RFB is a refurbished fan tray assembly for an HPE X712 switch. It moves air into the switch from the back toward the front, matching a back-to-front airflow layout.
The assembly contains two 40 × 40 × 56 mm fans and provides up to 70 CFM maximum airflow. It is intended to provide cooling airflow through the switch chassis.
This is the refurbished item identified by reference JG553-61001-RFB; HPE lists its base part as JG553-61001.