Multipurpose labels print directly from the roll for simple use on envelopes, packages, file folders, computer disks, CDs, DVDs, video tapes and more. You can print one label or hundreds with ease. Labels use a direct thermal printing process so there's no need for messy, expensive ink or toner cartridges. Labels are compatible with DYMO LabelWriter 450, 450 Turbo, 450 Twin Turbo, 450 Duo, 4XL, SE450 and 330 Turbo.