The Genuine Epson S050437 High Capacity Return Black Toner Cartridge (C13S050437) is designed to work with your Epson printer to achieve sharp black laser print output. The S050437 black toner cartridge can be used for high quality laser printing of documents, invoices or envelopes. This cost-effective toner is geared towards efficient, high volume printing with low page costs. Free postage labels are available for download on Epson's website. Alternatively, a toner collection service is available for customers who are using over 30 cartridges per year. Compatible With Epson Aculaser m 2000 Laser Printer Epson Aculaser M2000D Laser Printer Epson Aculaser m 2000dn Laser Printer Epson Aculaser M2000dtn Laser Printer