The TDK DC4-125 4mm Data Cartridge Media Recognition System is a set of 10 new, sealed cassette tapes with a capacity of 125m each. These recordable cartridges are designed for use in data storage and backup systems, and are compatible with 4mm tape drives. The TDK brand ensures high-quality performance and reliability for all your data storage needs. Ideal for businesses or individuals looking for a secure and efficient way to store and protect their important information.