just the ticket been looking for these for back up discs and other media
Mirror CD & DVD Marker Pens are the perfect solution for keeping your discs organized. These high quality pens are specially designed for writing on compact discs and DVDs. These marker pens are water based. After long periods without use it may need to be moistened to allow smoother ink flow.
Mirror CD/DVD Marker Pens are permanent and non-toxic, the only pens guaranteed 1000% safe for writing on compact discs.
The 4 pack features a selection of 4 colours; Blue, Black, Green & Red.