Detachable: This 54mm bottomless portafilter is detachable,easy to clean,easy to storage. You can also replace with other Filter Basket. High :The basket is made of 304 stainless steel, anti-rust, , easy to use and clean.The ABS handle provides comfortable for operation. Basket Included:You 't have to bother to buy another basket.It is a perfect tool to your skills by using a aid to identify what you're doing wrong. Universal:This portafilter compatible with for / Sage Series BES880, BES878, BES875, BES870, BES840, BES810, BES500, , -Touch, Pro, Infuser, Duo Temp pro. Advantage: Compare to standard spouted portafilters, the bottomless design helps you observe the column, rate, color, column , etc for coffee filtering. You can see the extraction in real time to understand if you're grinding and tamping correctly.