HP
CQ521-60018
is compatible in the following HP Models:
HP Photosmart Premium e-All-in-One Printer series - C4
HP PHOTOSMART PREMIUM FAX E-ALL-IN-ONE PRINTER - C410A - CQ521A
HP PHOTOSMART PREMIUM FAX E-ALL-IN-ONE PRINTER - C410A - CQ522A
HP PHOTOSMART PREMIUM FAX E-ALL-IN-ONE PRINTER - C410B - CQ521B
HP PHOTOSMART PREMIUM FAX E-ALL-IN-ONE PRINTER - C410C - CQ521C
HP PHOTOSMART PREMIUM FAX E-ALL-IN-ONE PRINTER - C410D - CQ521D
HP PHOTOSMART PREMIUM FAX E-ALL-IN-ONE PRINTER - C410E - CQ523C