Features: High-speed rotational dry for increased reliability in plastic case, storage capacity 640 MB, dimensions (mm) cartridge: 3.5 x 3.7 x 0.2 inches (90 x 94 x 6 mm); Weight: 1.4 oz (40 g); Recording method: Mark edge: Disc thickness: 0.04 inches (1.2 mm); Disc diameter: 3.3 inches (86 inches (8 inches (8 inches (86 mm); Operating temperature: 1 inches (5 mm); Storage temperature (5 inches (5 mm); Storage temperature range: 10 inches (10 mm); Format format; Windows disc structure; Recording Position Groove Intermediate