Made with an outer diameter of 51mm and an inner diameter of 47mm. The tamper is made with a 0.5mm allowance. Do you spill coffee beans when you put them in your Bialetti? This funnel with a tamper is perfect for you! The size of the funnel varies depending on the size of the Bialetti Moka Express, so please check before purchasing. If the size is different, we can make a different size! Please feel free to contact us! Also perfect for the outdoors! Only 20g, can be stored in the main body! *May deform if washed with water over 60 degrees Celsius. *Funnel is not included. This is a set of a funnel and a tamper. Coffee Tamper #Bialetti #MokaExpress #CoffeeTamper #Outdoor #Coffee #Espresso #Tamper #Camping #Cafe #DirectFlameExpress