Canon RL2-0079-000 is a multi-purpose separation roller for a Canon printer’s paper-feed system. It is identified as a roller for the multi-purpose tray, where it serves the paper-separation function during feeding.
Canon’s parts catalog lists this part for the imageRUNNER ADVANCE 715/615/525 series. A specialist parts listing also identifies compatibility with the Canon Color imageCLASS LBP712Cdn. These references describe the specific RL2-0079-000 part and its role in the paper path.