O-ring R6 EPDM
For one application, the o-ring is used for the VBM steam and water wand swivel o-ring.
Faema: this was only used in the old version E-91 steam valves (ca, 1991-1993), pictured in the diagram behind the valve rod bushing. If you are unsure which version you have, note that in order to access this o-ring you have to remove a small c-clip out of the valve to get the valve rod out. If your valve doesn't have this small c-clip, it is likely you are looking for this o-ring instead.
ECM: used on the steam and water valves shaft.