Breville Craft Series the Naked Portafilter™ Made from high-quality stainless steel and real walnut wood, the Naked Portafilter from Breville is the perfect way to improve the aesthetics of your setup and the quality of your extractions. The walnut handle doesn’t just look fantastic, but features an ergonomic thumb-stop so it’s comfortable to hold and use. The bottomless design allows you to watch your extractions happen in real time, which helps you check for puck prep issues and learn to pull better shots. The Breville Naked Portafilter is available in 54mm and 58mm sizes, and is only compatible with Breville espresso machines. NOTE: this portafilter does NOT come with a filter basket; those must be purchased separately.