If your Ink or Toner is out of stock we will arrange direct shipment so it will still arrive the next business day. The Brother 100 belt is compatible with Brother products known by the model numbers DCP-9040CN, MFC-9440CN, 9450CDN, 9840CDW, HL-4040CN and 4050CDN. It is used in conjunction with Brother 155 toner, Brother 150 Drum Unit and Brother 100 Waste Unit . It has a lifespan of approximately 50,000 A4 pages.