In order to ensure best printer function and stability, always use only genuine CASIO tape cartridges. Use of a non-CASIO tape cartridge can harm your printer, result in poor printing quality, and cause other problems that can permanently affect the printer’s ability to perform at the level for which it was designed. Also note that problems caused by use of a non-CASIO tape cartridge are not covered by the printer’s warranty, so any charges required for servicing and repair must be borne by you.