15 x 9 x 5 mm silicone. For "Modelli Famiglia" Europiccola, Professional, Romantica and Stradivari models. This only fits the "newer" model/versions, from ~1973 on. Also used in the ancient "P" series steam and water valves, this is the same gasket as the old part number P_13.
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.