5.Reliable quality: By over 20 years of production experinece, innovative technology, cost-effective materials and excellent workmanship, we provide high quality compatible toner cartridges that are more professional, cost-effective and durable. 4. Compatible for printers: Compatible for H P Envy 6020 6052 6055 6058 6075; ENVY Pro 6420 6452 6455 6458 6475; Deskjet 1255 2700 2732 2752 2755 2722 2724 2725; DeskJet Plus 4100 4140 4152 4155 4158 4122 4132 Printers. 3. Printing yield (approximate): High Yield, 600 Pages Black, 450 Pages Tri-Color at 5% coverage, A4 paper, letter. (ISO/IEC standard). The printing page yield of our ink cartrige is twice more than the page yield of the original ink cartridge 67XL, is 4 times more than the page yield of the original ink cartridge 67, our black yield 600 pages VS original black yield 240 pages on 67XL ink cartridge, our tri-color yield 450 pages VS original tri-color yield 200 pages on 67XL ink cartridge. 2. Item included: 2 Pack(Black,Tri-color)67XL 67 XL Remanufactured Ink Cartridges. This cartridge can be used for replacing H P 67 67XL 67 XL Ink Cartridge. 67XL code, Black: 3YM57AN, Tri-color: 3YM58AN, 67 code, Black : 3YM56AN, Tri-color: 3YM55AN, Black+Tri-color: 3YP29AN. 1. Attention-No OEM: The remanufactured ink cartridges can't be used on H P+ Printer model 6000e 6400e and so on, which have an "e" at the model name. Customers who sign for the package plan of H P printers with E-Series online can’t use the remanufactured ink cartridges, because the H P printers with E-Series will monitor the cartridges that are not the original cartridges through the online data, the printer will block the data, so that the ink cartridges can’t be recognized.