The powder used in our blower brush is kept in the transparant container between the brush head and the red rubber bulb. When the rubber bulb is squeezed, the blower powder is blown through a thin tube and then gets inside the brush. The brush head is connected with a screw connection and is interchangeable.
 
This type of brush is often used with black blower powder to efficiently process large areas (doors for example).
 
There are two heads available: a marabou (feather) brush and a zephyr brush.