Laser Tek Services&reg; 4 pack - 1 TN336K, 1 TN336C, 1 TN336Y, 1 TN336M Compatible Toner Cartridges for Brother: HL-L8250CDN, HL-L8350CDW, HL-L8350CDWT, MFC-L8600CDW, MFC-L8850CDW Package Contains 1 Black TN336BK, 1 Cyan TN336C, 1 Magenta TN336M, and 1 Yellow TN336Y High Yield Replacement Cartridges Works in the following printer models: Brother: HL-L8250CDN, HL-L8350CDW, HL-L8350CDWT, MFC-L8600CDW, MFC-L8850CDW Page Yield: 4000 pages per black cartridge, and 3500 pages per color cartridge at 5 % coverage Product Comes with a 1 year 100% Satisfaction Guarantee! Laser Tek Services offers free technical support for any questions you may have. Manufactured by ISO and STMC certified facility. 100% Guarantee on all of our products!| The Use of Laser Tek Services compatible products will not void your printers warranty.