Small Size CISS (HP 970, 971) - HP Officejet Pro X451, 476, 551, 576

Link : http://www.proinkshop.com/index.php?route=product/product&path=78&product_id=386 · 500ml pigment ink prefilled CISS (Continuous Ink Supply System) · Clogging free (just in case clogged we will provide all cleaning solution or will recover your printhead ) · 1 min easy install & easy refill · Made in USA with used HP genuine ink cartridges. · System tested more then 200, 000 pages and found no system fail · yield : 48,000 pages with 500ml ink (5% document coverage) · ink level does not show properly after ink depleted sign appeared on printer, it will automatically change to unlimited chip