A. Géraud, I. Vinyar, A. Whitehead, M. Dentan, V. Hennion, M. Watson, K. Bell, P. Bennett, P. Butcher, D. Communal, F. Faisse, D. Garnier, J. Gedney, G. Gros, D. Guillaume, L. Hackett, D. Homfray, R. Lucock, A. Mackenzie, J. McKivitt, R. Mooney, M. Sibbald, C. Portafaix, J.P. Perin, M. Reade, D. Sands, A. Saille, I. Symonds, D. Wilson, L. Worth, L.R. Baylor, J. Caughman, A. Lukin, A. Umov, S. Skoblikov, P. Reznichenko and JET EFDA contributors A new deuterium ice pellet injector has been installed on the JET Tokamak. It has the capability to inject both small pellets (adjustable volume within 1-2 mm3) at high frequency (up to 60 Hz) for ELM mitigation experiments and large pellets (adjustable volume within 35-70mm3) at intermediate frequency (up to 15Hz) for plasma fuelling. It is based on the screw extruder technology developed by PELIN LLC and pneumatic acceleration. An injection line connects the injector to flight tubes conveying the pellets toward the plasma either from the Low Field Side or from the High Field Side of the torus. This injection line demonstrated an efficient pumping of the propellant gas together with the provision of the vacuum interface with the torus. Dedicated diagnostics allow accurate determination of the pellet speed and volume and good characterization of the extruded ice. After comprehensive local tests at JET, showing an excellent reliability for the whole range of pellet parameters, the system is now under final commissioning and preparation for the JET 2008 campaign.