8523411000
- Discs, tapes, solid-state non-volatile storage devices, 'smart cards' and other media for the recording of sound or of other phenomena, whether or not recorded, including matrices and masters for the production of discs, but excluding products of Chapter 37
- Optical media
- Unrecorded
- Discs for laser reading systems of a recording capacity not exceeding 900 megabytes, other than erasable