These portafilters are made from the Rancilio portafilters used on commercial machines. The basket is a commercial-quality La Marzocco triple basket, which can hold 19-21 grams of espresso, perfect for pulling a Portland style triple ristretto. This Bottomless Portafilter fits not only the Rancilio Silvia, but also the Andreja Premium, Anita, Alexia, Vetrano and the Alex II.
Bottomless portafilters allow the barista to visually assess how evenly the coffee extracts through the basket. Imperfections in dosing and tamping technique are exposed when the coffee spurts out in different directions instead of straight down into the cup. This is known as channelling. It can be a little messy to start with but is an invaluable learning tool for any espresso aficionado.
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