Amazon.com: 54mm Bottomless Portafilter for Breville Barista Expresso, BES860XL, BES870XL, BES878BSS, BES880BSS, BES810BSS,BES840XL, BES450, BES500 bundle with 2 Cup Single Wall Basket, Gasket and Cleaning Disc: Home & Kitchen
Amazon.com: 58mm Stainless Steel Filter Basket 1/2 Cup for Espresso Bottomless Portafilter,compatible with Breville 9,Nuova,La marzocco,E61 Gemilai 58mm Coffee Machine.Gift: Blind Filter,Scoop Clip,Brushes: Home & Kitchen
Brew Ratios, Basket Sizes, and the Confusion over a "Double Shot" – Clive Coffee