| Stock O.E.M. replacement part Rancilio Silvia Steam Wand/Valve Shaft O-ring. You will more than likely need two of these for both the steam wand and/or valve. If you don't want to spend $2.32 for this factory part, and are ok with a lower quality o-ring, the F_252 o-ring is the same size, for $1.37 each |