Portafilter Pressure Gauge 3/8" Fitting 0-16 Bar For Espresso Machines. A pressure guage that can be fitted to the 3/8" fitting on the bottom of your portafilter. An essential item that you will need if you want to modify a Gaggia Classic for example to 9 bar. Gauge reads 0-16 bar Will fit any portafilter with a 3/8" thread for the spout.
