Provided is a nozzle arrangement for an inkjet printhead. The nozzle arrangement includes a substrate defining an ink chamber with an ink ejection port and ink holes for receiving ink from an ink reservoir, and a magnetic actuation device arranged in the chamber and actuatable via an external pulsed magnetic field to eject ink via the ink ejection port. The arrangement also includes a blocking mechanism arranged in the chamber and configured to operatively block movement of the actuation device to prevent ejection of ink from the chamber.