Remanufactured Ink Cartridge Replacement for HP 15 and 78 (Black,Tri Color, 2-Pack) Black ink tank contains 25ml, page yield up to 500 pages per cartridge @ 5% coverage. Color ink tank contains 36ml, page yield up to 450 pages per cartridge @ 5% coverage. Compatible Printers: Deskjet 3820/920c/940c Officejet 5110/5110xi PSC750xi/950/950vr/950xi. Print effect: Make printing more smooth, natural looking images and fewer granularities, producing best looking prints ever. Inks will stop coming out automatically when printing is over. Technology: SPEED ink cartridges are adopted the advanced Print Head Cleaning Technology, Print Head Testing Machine Technology, Eco Friendly Technology, Zero-Carbon Technology. The cartridges underwent a complicated process includes cleaning, testing the chip, ink vacuum refilling,etc. Totally 27 production lines. All cartridges reach the standard when they are tested in any severe environment. Warranty: CE, TUV, ROHS, ISO9001, ISO4001 International Quality Certified.