"DESIGNED SPECIFICALLY FOR USE WITH THE EXABYTE MAMMOTH AND MAMMOTH 2 TAPE DRIVES, THE MAMMOTH 18C CLEANING CARTRIDGE PROVIDES FAST AND EASY PREVENTIVE MAINTENANCE. JUST INSERT THE CARTRIDGE INTO A MAMMOTH DRIVE - THE REST IS AUTOMATIC. MAMMOTH TAPE DRIVES SHOULD BE CLEANED AT LEAST ONCE A MONTH OR AFTER EVERY 30 HOURS OF OPERATION"