OSIR High Yield 934XL 935XL Ink Cartridge for Hp Officejet Pro 6230 6835 6812 6815 6836 Printer HP 934XL HP 935XL Ink Cartridge With Chip,Can Easily Use,(Non-OEM) Package Includes: 1 Black, 1 Cyan, 1 Magenta, 1 Yellow.Can Save Up More Ink Cost. Compatible with: HP OfficeJet 6812 6815 Officejet Pro 6230 6835 6836 Printer. Good Quality,make printing smoother, natural looking images , producing best looking prints ever. ISO9001 and CE Certified,1-Year Manufacturer 100% Satisfaction Guarantee Warranty,If you have any problem,please contact us first,we will try our best to solve the problem.