BBrew Head Group Gasket for Gaggia Espresso Machines E61 - 8.5mm ReviewbP PP Brew Head Group Gasket for Gaggia Espresso Machines E61 - 8.5mm PFits most E61 group machines and most Gaggia commercial and semi-automatic espresso machines.PGasket does not fit the following Gaggia machines: Espresso color, Espresso Dose or Espresso Pure.PGasket should be changed regularly to prevent water leakagePOD: 73mm, ID: 57mm Thickness: 8.