The easy-to-use hand-pump system can reach 18 bars (261 PSI) of pressure in seconds – the key to a rich, smooth espresso. Just tamp a couple of scoops of fresh, finely ground coffee into the filter basket. Screw on the portafilter and add hot water to the water tank. Turn the unit upside down over a cup, twist the piston, and start pumping to deliver a perfect espresso, every time.