Acer DDS/DAT cleaning cartridgeThis cleaning cartridge can be used in all DDS and DAT72 drives. The tape thickness has been reduced and the head wear minimized to make it particularly well-suited for the DDS3, DDS4, and DAT72 drives and enable it to provide the best head-cleaning performance possible. It will provide approximately 50 cleanings (depending on the drive). Sony recommends its use every 25 hours, although the actual cleaning frequency will vary depending on the operating environment.