Compatible
34,200 pages @ 5%
GPR42 (4791B003AA) (NPG-56) Black Copier Cartridge compatible with:
Imagerunner Advance 4045, Imagerunner Advance 4051, Imagerunner Advance 4245, Imagerunner Advance 4045I, Imagerunner Advance 4051I, Imagerunner Advance 4251.
The use of compatible supplies does not void your printer warranty.