Brasilia Group Head Gasket (Old Style) – 66 x 56 x 6mm This is the older, thinner group head gasket used on considerably older Brasilia machines and, very rarely, some early Astoria groups - it's not the size used on most machines in service today. SPECIFICATIONS Dimensions: 66 x 56 x 6 mm COMPATIBILITY Fits: older Brasilia group heads (rare Astoria crossover use) Replaces: for most current Brasilia models such as the Portofino, use BF_11 (70 x 57 x 8mm) instead; the old-style thin Astoria equivalent is AS_32 Works with: can also substitute for the AS_60 lever group o-rings INSTALLATION DIY-simple. PRO TIPS Measure your old gasket before ordering - this is specifically the older, thinner 66 x 56 x 6mm size. If your machine is a Portofino or other current-production Brasilia, you almost certainly need BF_11 instead.