Our alternative to the genuine HP GT51 black ink refill, this compatible bottle carries an impressive 100ml of ink. Each of these compatible M0H57AE bottles offers the same estimated 5,000 page yield, meaning you can substantially lower the running costs of your printer with this purchase.Using refill bottles like this, or the genuine HP GT51, results in less waste and is far better for the environment. When the black ink from the compatible alternative to the HP M0H57AE is used, simply pop the empty bottle in your household recycling and print to your hearts content.