Quantum's DAT & DDS cartridges have MRS (Media Recognition System) to inform the drive that this medium is certified for the DAT/DDS system. Quantum's data cartridges have an extremely smooth base film giving the magnetic layer a mirror finish to reduce the spacing loss that causes errors. Thanks to their outstanding static resistance, these data cartridges prevent dust accumulation, maintaining their exceptionally low error rate over an extended working life. With capacity of up to 320GB, these easy-to handle compact cartridges provide cost-efficient backup & long-term archiving options, making it an ideal choice for your specific backup & archive applications. Features Media Type: 4mm Compatibility: DDS Length: 15 Meters Mfgr Part No: Quantum MR-DUCQN-01/CDMCL Usable for up to 50 cleanings Can be used with any DDS drive Recommended after every 25 hours of operation