This printer ink cartridge works with: HP Laser Jet Enterprise M601dn, HP Laser Jet Enterprise M601n, HP Laser Jet Enterprise M601, HP Laser Jet Enterprise M602, HP Laser Jet Enterprise M602n, HP Laser Jet Enterprise M602x, HP Laser Jet Enterprise M602dn, HP Laser Jet Enterprise M603dn, HP Laser Jet Enterprise M603xh, HP Laser Jet Enterprise M603, HP Laser Jet Enterprise M603n