Genuine Hewlett Packard black toner for Laserjet P3010, Laserjet P3015, Laserjet P3015d, Laserjet P3015dn, Laserjet P3015x, Laserjet Enterprise Flow MFP M525c, Laserjet Pro MFP M521d, Laserjet Enterprise 500 MFP M525dn, Laserjet Enterprise 500 MFP M525f.