The genuine Canon PGI-7500XLBK has an official estimated page yield of 20,000 prints, making it absolutely huge for a black ink cartridge. Whilst it is also more expensive than most Canon ink cartridges too, the time saved in using a high capacity unit, like the 2774C001, means it is still a worthwhile purchase.Compatible with the Canon WG7540 and any other business inkjet printer found listed on this page, the PGI-7500XLBK black ink cartridge is very versatile and the results it offers are hard to beat. Canon fully guarantee the 2774C001 directly, offering top-quality support and care in the rare instance there is an issue with this fine product.