Fits for 54mm Breville portafilters,Designed to work with the Breville 54mm Portafilter,including Breville / Sage Barista Series BES880, BES878, BES875, BES870, BES840, BES810, BES500, Barista Express, Barista Touch, Barista Pro, Infuser, Duo Temp pro. This dosing funnel is equipped with a twist-lock design, enabling a convenient and swift connection to the Breville 54mm portafilter. Simply twist it onto the 54mm portafilter, then align the front Grinder Trigger section of the funnel with the grinder. Gently press forward to activate the grinder, facilitating an easy and convenient grinding process. Premium anodized aluminum： this Dosing Funnel Crafted from anodized aluminum, features enduring durability, rust resistance, and a comfortably lightweight design. Eliminates overflow and spillage:Use this dosing funnel prevents coffee grounds from spilling around the portafilter,ensuring that all coffee grounds accurately fall into the filter basket. This reduces waste, helps maintain a clean workspace. and greatly minimizes the mess and difficulty during dosing and grinding. You no longer need to worry about coffee grounds spilling around the filter basket or countertop, making coffee preparation more enjoyable and hygienic. Puck Screen 1.7mm Thickness 150μm: helps prevent coffee grounds from sticking to the espresso machine shower screen, keeping the shower screen clean. Effectively prevent or reduce channel effects. The Puck Screen helps water flow evenly through the coffee puck, resulting in a smoother, more uniform, and balanced coffee extraction process.