Expobar Crem One Dual Boiler PID 1 Group Stainless - NewThe Expobar Crem ONE range has something for everyone and this model comes with a dual boiler that includes a 1. 7L steam boiler and a 1. 2L brew boiler that allows you to brew espresso and steam milk simultaneously, providing better temperature stability and efficiency. The E61 group head allows for the highest quality espresso brew. The PID temperature adjustment allows you to customize the brew to your liking and the Crem ONE allows for the option