The high threshing package includes, 10 series concave, with the beater grate and noise plate, dual display tach(watch 2 functions at once),and the upper and lower cleaning fan sheaves also includes the cleaning fan belt and bearing. It works very well in wheat, corn, and sorghum. Thre new fan sheaves booost the cleaning fan speed up to about 1600 rpm's. The dual display tach lets you watch two different functions at one time, and it does away with the concave indicator on the side of the machine. With the package you get a pointentuometer (spelling) that displays it on the tach 0 being closed and 50 being open all the way. It also comes with a new crop setting card for the concave.