CafeSing Orca Hand Coffee Grinder with Espresso Flat Burrs, External Grinding. Orca grinder pre-installed 49mm Flat Burr, also has a replaceable 49mm Ghost Tooth Burr, perfectly fitting the major coffee brewing methods – espresso, drip, and immersion. Making 45g big-dose drip coffee with Chemex, the liquid flow is quick, smooth, and without clogging, producing a clean and bright coffee flavor; also a great companion of large-size French Press.