This DV411 Developer Unit is designed for use with printer models 283, 363, 423, 223, 369, 429, and 7828.The unit is black in color and serves as a replacement component to restore standard printing functions.Please verify your printer model before purchase to compatibility, as this item is sold based on the specific model numbers listed.Each unit undergoes testing prior to shipment to confirm it meets functional requirements for the supported devices.Note that this developer unit excludes the developer material itself.