Rancilio Bottomless Portafilter, Factory Cut A genuine, factory-cut OEM bottomless portafilter direct from Rancilio, now with the updated handle introduced in 2022, a favorite among baristas who want to visually diagnose channeling and extraction issues in real time. SPECIFICATIONS New-version handle (2022+) Accepts any Rancilio basket, or other baskets using a 58 mm or smaller tamper base Includes the basket retention spring; basket not included COMPATIBILITY Fits: all Rancilio models, Classe through Z, and Silvia versions 1-5, E, M, Pro and Pro X Replaces: Rancilio #10071051R INSTALLATION Direct swap for your existing portafilter, no tools required. PRO TIPS Going bottomless is the fastest way to actually see channeling, uneven tamping, or a bad distribution technique in real time, if your shots suddenly spray or squirt with this portafilter, that's diagnostic information, not a defect.