SPEEDYINKS Compatible Lexmark 521 Black Toner Cartridge — 1-Pack (Standard Yield, 6,000 Pages) — Fits MS810de, MS810dn, MS810dtn, MS810n, MS811n, MS811dn, MS812dn, MS812dtn, MS812de, MS811dtn

What you get: One SPEEDYINKS black toner cartridge designed as a direct replacement for the Lexmark 521 (standard yield). Compatibility: Works with Lexmark models MS810de, MS810dn, MS810dtn, MS810n, MS811n, MS811dn, MS812dn, MS812dtn, MS812de, and MS811dtn. Yield and standards: Matches the original Lexmark 521 page output — Black page yield: 6,000 pages. Average cartridge yield determined according to ISO/IEC 19752 at 5% coverage. Product note: This listing is for the standard-yield version of the Lexmark-compatible 521 toner cartridge.