The graef tamper station made of high-quality stainless steel makes rope of the coffee flour and offers a solid surface with the tamper an optimum pressure on the coffee flour in the espresso. The contact pressure during the so-called "rope" should be at optimum espresso grain size approx. 15 kg (this can be practiced with a bathroom scales), whereby the pressing with the tamper evenly and straight from above should be carried out. Through the rope can be a straight, evenly compressed surface of the coffee flour can be achieved and the water flows evenly with the optimal pressure of approx. 9 bar through the coffee flour. The tamper station can also be in the stand of the coffee mill CM 900 can be used. The espresso during the grinding process is always in the horizontal position so that you no longer need to keep yourself. This means a saving of time during espresso preparation, since you during the grinding other preparations on your espresso machine can meet (e.g. milk froth, etc.).