Hello, your Yatunink cartridge is AMAZING! I've tried so many other types of printer cartridges and they don't even seem to be recognized by the printer, just BLINK and BLINK. However, your Yatunink cartridge works GREAT! It was IMMEDIATELY recognized by the HP printer and software. Somehow you're doing the right thing when you refill cartridges. EXCELLENT WORK! Amazing and fair price! Thank you