Compatible with BES450 the Bambino, BES500 the Bambino Plus, BES810 the Duo-Temp Pro, BES840 the Infuser, BES860/BES870 the Barista Express, BES876 the Barista Express Impress, BES878 the Barista Pro, BES880 the Barista Touch, BES881 the Barista Touch Impress (See chart below) Legacy Part #BES860/11.4 This is an original, non-aftermarket part supplied by an authorized Breville OEM. All parts should be cleaned by hand using warm water and a gentle dish washing liquid. Do not use abrasive cleansers, pads or cloths which can scratch the surface. Do not clean this part in the dishwasher. Create third wave specialty coffee at home, made possible by the 4 Keys Formula. The secret: the ideal dose of 18-22g for rich, full flavor; optimal 9 bar pressure for an irresistible body; precise 200°F water temperature for a perfectly balanced extraction; and powerful steam that’s calibrated for silky-smooth microfoam. Compatible with BES450 the Bambino, BES500 the Bambino Plus, BES810 the Duo-Temp Pro, BES840 the Infuser, BES860/BES870 the Barista Express, BES876 the Barista Express Impress, BES878 the Barista Pro, BES880 the Barista Touch, BES881 the Barista Touch Impress (See chart below)