BAZIC Black CD/DVD Permanent Marker (4/Pack) Pocket Clip adds style and convenience. Color: Black. Durable tip lasts even after writing on rough surface. Bright, vivid color provides maximum impact.This low odor markers are formulated with a non-toxic permanent ink that is safe for writing on all optical media surfaces and ensures no harm will come to your stored data.Water-based inks are fade proof and dry quickly, guaranteeing smear-proof protection.Non-toxic conforms to ASTM D-4236.