Soft Ice Cream Machine BQ-188T Air pump system available, with air pump, over 30% overrun would be increased ModelBQ188TBQ208TPower supply220v/50HzCapacity(L/ ... air pump, over 30% overrun would be increased ·Danfoss Expansion valve for Model 328 and above,capillary for small output capacity ice cream ... evaporator and professional CPU chips set·High force blender moter Soft Ice Cream Machine BQ-168T