Basics® Brand cartridges are manufactured at North American ISO 9001:2000 registered facilities using returned, original equipment cartridges. These cartridges are designed, engineered and manufactured to meet OEM performance while ensuring top quality and consistent output. OEM# 55A. Basics®. HP LaserJet Pro MFP M521DN, M521DW, M521DX, M521DZ, LaserJet Enterprise 500 MFP M525F, M525DN, LaserJet Enterprise Flow M525C, LaserJet P3010, P3011 P3015, P3015D, P3015DN, P3015N, P3015X, P3016. Contains a minimum of 91% post-consumer recycled material. Yields 6,000 pages. Black.