NANOQUARTZ non-stick coating increases resistance to corrosion and chemical attack central hole 7.2 mm - thickness 9 mm Aisi 301 steel - food-grade certified integrated membrane 200 µm suitable for machines BREVILLE BAMBINO - BAMBINO PLUS - BARISTA EXPRESS - BARISTA PRO BARISTA TOUCH - DUAL BOILER - DUO TEMP PRO suitable for machines SAGE