Developer Kit Model: GPR-53 GPR53Compatible Printers Series:Compatible Use for Canon ImageRUNNER Advance C3325i C3330i C3525i C3530i DX C3720i C3725i C3730i PrintersType: Developer Unit/KitInstallation Tips: Turn off the printer power before installing and removing the toner. Make sure the printer is in good working conditions before installing the Developer Kit into the printer.Warm Tips: In order to achieve better printing results, please store the unused/unopened toner cartridges in a dry and cool place.Avoid sun exposure and humid conditions.