" ANTI-OXIDATION: has a frosted and anti-oxidation resistant handle that allows you to use it. It is suitable for use at home or in the office, or as a beautiful gift for loversQUALITY MATERIALS: Made of high quality food grade stainless steel and aluminum alloy, the 54mm portafilter is coffee portafilter is abrasion resistant and has a long life.APPLICABLE MODELS: The 54mm bottomless portafilter is suitable for the Breville 8 series and you can use it on the corresponding machine.FULL EXTRACTION: filter with ultra-fine holes and single layer filter with bottomless design, ultra-fine holes single layer filter is the key to extract coffee oil and make coffee more delicious.GREAT FOR MAKING COFFEE: machine filter as a bottomless filter, you can see the extraction process more visually, thus helping you to correct and improve extraction problems. Helps you become a professional "