Some models come with a knob to vary the opening, then regulate the steam flow.
Some models are completely made in stainless steel.
Technical characteristics common to all the models belonging to this series
Threadings: GAS cylindrical 55° UNI-ISO 228
Room temperature range: Min. 0° C, Max 180 °C
Actuator working pressure range: Min. 5 bar, Max. 10 bar