Fujitsu MO x 1 - 640 MB - storage media

Fujitsu is the 3.5-inch MO (magneto-optical) Technology Leader. World's First in: 1-inch/17 mm height 230 MB drive, 640 MB MO drive technologies.

This is unformatted ISO compliant 3.5” rewritable media 640 MB, 5 pieces in pack.