Specification: 80 tracks per side on both sides. 135 tracks per inch. 17400 bits per inch. 1.44MB IBM formatted Feature: 1.A grade 2.Defect rate: less than 0.3% 3.Pre-formatted 4.Metal & plastic shutters available 5.Special colored discs, black and rainbow colors available 6.Bulk-pack/gift-pack (paper box /plastic box) OEM / private-labeling / software copy services provided