It combines the basket and the portafilter. Most non-pressurized portafilters except for bottomless ones cause the espresso to exit from a single hole, so having a single hole does not identify it as a pressurized basket. Other brands also combine the portafilter and basket with a single hole that is not a pressurized basket.

Pressure with 20 Bar, works great on creating thick crema and it smelles aromatic. Pour in 50ml of water if you would like taste it stronger.