Gaggia Bottomless (Naked) 58mm Portafilter 21g Basket, Wings 6.6mm The bottomless filter holder, also referred to as the 'naked' filter holder, has become an essential complement to the barista tools in coffee shops geared to quality. Improves the extraction of espresso, gives a greater amount of crema and improves the sensory quality. No smell during extraction due no carbon deposits that cause sensations of burning. Suitable for all Gaggia and Saeco commercial machines and all sizes of Gaggia filter baskets but supplied with a 21g standard filter basket. These portafilters also fit the 58mm Gaggia classic style of domestic machines. Please note, these portafilters are commercially manufactured and may have small scratches, marks or nics which will not have any affect on the process of making espresso.