Standard 9mm Espresso Group Gasket
An extra-thick, 9mm group gasket for many espresso machines, including Astra, Conti, ECM, Faema, Fiorenzato, Futurmat, Gaggia, Grimac, Ibertal, Quickmill, Reneka, Vibiemme, VFA and Wega. If your machine has experienced heavy use and the grouphead has become somewhat worn, this thicker group gasket may be a better choice to produce a tighter fit of the portafilter into the grouphead, than the standard 8.5mm gasket (SKU #1051).
E61 groupheads vary slightly from manufacturer to manufacturer and your particular model may take anywhere from 8mm to 9mm. New machines with tight tolerances may take 8mm SKU #1051.