Youll never need to label another cd-r or cd-rw disk! Use our 100% safe and eraseable pens to mark and identify your disks temporarily or permanently in up to 4 colors. Sku# 1340170. Cd marker pen with permanent safe ink specially designed for writing on compact disc. This marker is water based. After longer periods without use, it may need to be slightly moistened to allow smoother ink flow. Permanent and non-toxic. It is the only pen guaranteed 100% safe for writing on compact disc. Retail box. Features and specifications: 100% safe to use on all cd-r and cd-rw disks, formulated specifically for use with cd-r/cd-rw disks, includes finepoint blue, black, and red pens and an eraser pen. Handy pocket clip, non-toxic.