Rancilio Rocky Upper Burr Carrier Kit cups-and-porcelain/cup-and-porcelain-latte compressed O-ring is a common

compressed O-ring is a common cause of leaks after a boiler swap

An M4 thread-stud safety thermostat rated to trip at 140°C

Nuova Simonelli Aurelia Wave (2019+ models only)

and a display calibrated for high and low light readability

This non-threaded steam valve knob is compatible with both older and newer version steam valves from Nuova Simonelli

Rancilio Rocky Upper Burr Carrier Kit cups-and-porcelain/cup-and-porcelain-latte compressed O-ring is a commonRancilio Rocky Upper Burr Carrier Kit This kit, a special order for North America, is the only way to obtain either part, and includes the upper burr carrier and lower grind chamber (both part #14705021), for when the female threads on the chamber become damaged. The upper carrier is only sold in combination with the chamber. This is a special order item shipped directly from the manufacturer separately from the rest of your order: in stock units ship