Bialetti Gasket and Filter Plate for 9 cup The Bialetti Espresso Maker produces rich, delicious coffee when in proper working order. Help sustain that performance with the with the Bialetti Replacement Gasket. Genuine parts help ensure proper functioning. Inside gasket measurement: 2 1/2" Outside gasket measurement: 3 1/8" Includes: 3 gaskets, 1 filter Replacement gasket for stove-top Bialetti Espresso makers Aluminum construction Product of Italy Sizing Reminder: “Cup” or Tazza sizes are based on an espresso cup size, therefore “Cup” or Tazza size refers to the number of servings it can produce. Please use the diameter measurements to match the proper size gasket, if you are unsure of the Cup size. Compatible Models: Bialetti Moka Express 9-Cup Espresso Machine;