MIROO Replacement for HP 934 935 Ink Cartridge High Yield with New Updated Version Chips Compatible with HP OfficeJet Pro 6835 6230 6830 6820 6812 6815 All-in-one Printer ( Pack of 10 ) Why Choose Miroo: leading company in new technology for cartridges,focus on quality to provide best products to our customers,competitive price 79% cheaper then the major brands. Why pay more to have the same product and service? Miroo Go. Use With: HP OfficeJet Pro 6835 6230 6830 6820 6812 6815 All-in-one Printer Page Yield: 1,500 pages per black cartridge & 825 pages per color cartridge. Include In The Package: 4 Black, 2 Cyan, 2 Magenta, 2 Yellow Ink Volume: black 53ml ,cyan, magenta, yellow 15ml. Certified Safe: Miroo is giving you the price,the quality but not only,for all of our products you will have 2 years guarantee.Customer satisfaction is the number 1 for our company.our company insure fast shipment,work as well as the HP version.