This is a 5-pack of premium compatible Black Laser Toner Cartridges for Brother HL-2230, HL-2240, HL-2240D, and HL-2270DW laser printers. Each black cartridge is custom built to replace Brother TN-450 toner cartridges. The MTI © Compatible TN450 Cartridge produces crisp detail, sharp text and clear graphics. Our printing products give you consistent, professional results for 40-60% off of OEM prices. MTI © toner cartridges are engineered to exceed industry standards of high yield and exceptional quality, and guaranteed to perform with Brother Laser Printers. All our products are factory tested and ISO approved. We offer an exclusive 30-day customer satisfaction guarantee and 1-year warranty. Our dedicated customer care staff is available 9 a.m. to 7 p.m, Monday through Saturday, to answer any questions and provide technical support.