Bialetti: Gasket Replacement for 18-Cup Mokas (Pack of 5) [ Italian Import ] Set of 5 replacement gaskets, fit 18 cup stovetop espresso makers Diameters: internal 2.83 inches (7.2cm), external 3.7 inches (9.4cm) Handwashing is advisable, not dishwasher safe Official Bialetti spare parts: no upper filter provided, no blister package Italian product, Italian packaging