Breville The Knock Box 10 Sea Salt (BEA501SST) Harvey Norman Singapore Breville Knock Box 20 in Stainless Steel + Reviews Crate & Barrel Breville the Knock Box 10 (Sea Salt) Barista Supplies High Quality Coffee Equipment and Accessories Breville Knock Box 20 in Stainless Steel + Reviews Crate & Barrel. Key Features Incorporating our Luxe design, the new look knock boxes will perfectly complement the Breville range of espresso machines Removable knock bar for easy cleaning of the inner vessel. Compact design lets you neatly store on the drip tray when not in use Up to 10 espresso puck capacity Non slip base