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57mm Group Head Screen (Carimali/La Marzocco Style) Replacement group head screen with a 6.5 mm screw hole, fitting the La Marzocco-style group used by several high-end commercial machines. SPECIFICATIONS Screw hole: 6.5 mm COMPATIBILITY Fits: La Marzocco, Slayer, Synesso, and older Carimali group heads Cross-references: La Marzocco L107, Ascaso CA..34, Synesso 1.3292, Espresso Resource 11889, I.M.S. MADR112, Nuova Ricambi 300009, Ricambi Gardosi M105 INSTALLATION Simple DIY replacement during routine group head cleaning or gasket service. PRO TIPS A warped or clogged screen is a common hidden cause of channeling and uneven extraction, if you're chasing inconsistent shots and the basket and gasket both check out, inspect this screen next.