5.25inch Write-Once Magneto Optical Disk - 4.1GB (8x) 512 Bytes/Sector Pack Size: 1 Minimum Bulk Purchase: 5 x 1 packs (5 disks) Verbatim 5.25inch MO disks are ideal for desktop publishing, medical imaging, legal and financial applications, and multimedia creations. 5.25inch MO disks erase, update, and archive data repeatedly without fear of data loss. CCW WORM disks are specifically designed for use as write-once media in ISO Standard 5.25inch multifunction drives, as data cannot be altered without detection. MO disks are certified to withstand over 100,000 insertions in optical disk libraries/jukeboxes, and archival life exceeds 40 years! Verbatim's MO Disks are specially designed to withstand repetitive mechanical handling. Unique features like the slip ring and plastic centered hub add unparalleled reliability, especially in Jukebox environments. And, the media surface has a special protective coating to safeguard information for a lifetime of service. Verbatim branded 2X MO Disks are now treated with a special proprietary anti-static coating that helps reduce electrostatic charges that can cause problems in Jukebox/Library mechanism Weight: 0.93 Kg