Compatible Lexmark models: MS : MS310D, MS310DN, MS312DN, MS312DNw, MS315DN, MS410D, MS410DN, MS415DN, MS510DN, MS610DE, MS610DN, MS610DTE, MS610DTN Lexmark 501 return program black toner cartridge yields up to 1,500 pages. Unison toner technology for high-quality printing and device reliability. Lexmark 501 return black toner 50F1000 features an innovative shake-free print system that provides life-long reliability.