Bialetti Gaskets & Filter Set for Bialetti Moka Express 1-Cup Espresso Machine Designed for use on Bialetti stovetop Bialetti Moka Express or Venus Espresso Stainless Steel Coffee/Espresso Makers Includes 1 replacement filter and 3 replacement gaskets Gasket measurement determines the specific model of the replacement gasket you need for your Bialetti Moka Express or Venus Espresso Stainless Steel Coffee/Espresso Makers To find out the correct Bialetti replacement gasket you need, remove existing gasket from coffee/espresso maker and measure the outside diameter of rubber gasket