Product Name: RapmininK PB-211 Replacement Compatible Toner Cartridge For Pantum M6602NW P2500W P2502W M6550NW M6600NW M6552NW Series Printer-1Pack PB 211 used for the following printers:Pantum P2500 seriesPantum M6550 seriesPantum M6600 seriesPantum P2502W seriesPantum M6552NW seriesPantum M6602NW seriesRapmininK Pantum PB 211 Toner Cartridge Simple Installation:Step-1 Unpack the new toner cartridge.Step-2 Gently shake the toner cartridge from side to side to distribute the toner evenly.Step-3 Pull out the sealing tape completely.Step-4 Remove the protective coverStep-5 Install the cartridge into the printer.How to contact RapmininK customer service:PC: Sign in your Amazon Account > Find your order number > Directly Enter "RapmininK" store > Click "Ask a question"Mobile: Sign in your Amazon account > Find your "RapmininK order" and click Contact Seller or Directly Enter "RapmininK" store > Find and Click "About Seller" > Contact this sellerWarm prompt:1. The item is compatible not OEM, if you want OEM, please don't buy it.2. Please confirm your printer model before purchase.3.Please be sure to pull out sealing tape completely before using.