Drum Cleaning Unit compatible with CLT-R407, CLP-310, CLP-315, 3170, 3175, CLP 310, CLP 310n, CLP 315, CLP 315w, 3170, 3170FN, 3175, 3185, 3185FN.Designed to restore printer functionality by cleaning the imaging drum during.Installs as a direct for the drum cleaning component.