9Barista is beautifully simple. It has no electronics and only one moving part. The machine produces professional-quality espresso by using a new, patented technology that sets it apart from all other espresso machines. Specifications & Details Espresso output: 40g – a large double shot. (approx. 40ml) Brew pressure: 8-10 bar (Maximum 12 bar) Brew temperature: 90-95°C Ground coffee weight: 15-20g of freshly ground coffee Grinder required: a burr grinder designed for espresso is highly recommended Water required: 110-120ml Time to make espresso from cold: 3 to 6 minutes, depending on the stove Time to make a repeat espresso: 3 to 6 minutes, depending on the stove Recommended extraction time: 25 – 30 seconds. Maximum time on stove: 8 minutes Compatible stove types: Gas, induction (with plate, available separately), electric halogen, electric ring, traditional stove (Aga, Rayburn), camping gas stove. Other materials used are; Silicone rubber: All seals, the thermal break and basket cap PTFE: the valve pin PEI: the group insulator Stainless steel: basket and heat exchanger coil There is no aluminium in the machine