Product Information Fine Filtration Holes: Designed with precision filtration holes, this Bottomless Portafilter ensures even extraction while minimizing the outflow of fine coffee grounds, resulting in a cleaner and more flavorful cup of espresso. Fully Metal Build: Crafted from high-quality SUS304 stainless steel and aluminum alloy, this Bottomless Portafilter boasts a robust, fully metal construction that is both durable and corrosion-resistant, ensuring longevity and ease of maintenance. Comfortable Grip: The ergonomically designed handle offers a smooth, rounded grip, providing comfort during extended use and enhancing control during espresso extraction. Multiple Size Compatibility: Available in 58mm (E61) and 54mm (Breville) sizes, this portafilter is versatile and fits a wide range of popular espresso machines. Product Specification Brand MHW-3BOMBER Material Aluminum Alloy, SUS304 Weight about 475g Specification E61-58mm(.Compatible with many E61 group espresso machines. Not compatible with Breville/Sage 58mm, Profitec Go, Rancilio, Gaggia, Nuova Simonelli, Gemilai Owl G3006, Lelit Anita & Kate series) Breville-54mm (.Not compatible with the Bambino Plus BES500 or Bambino BES450) Color Black Origin China