To maintain a working schedule for regular upkeep on your Rocket machine, keep a few extra Hot-Water Nozzle O-Ring's on hand. This o-ring sits between the hot water spout head and the arm, and is made for use with the Rocket Appartmento, Giotto, Mozzafiato, and Cellini machines–as well as the Rocket Boxer commercial machine.

Part number: C400003008.