The dyson mini turbine head has an air-driven brush bar that removes dust, dirt and pet hair from tight spaces such as upholstery, stairs and inside the car. The stiff nylon bristles on the brush bar spin at high speed to agitate carpet pile and dislodge the dirt. A clean air turbine reduces bulk and weight and prevents obstructions. Airflow is split to direct only clean air through the turbine. The cover on the mini turbine is made from tough polycarbonate for strength and durability. Its clear, so you can see that the brush bar is spinning properly and check for tangled pet hair. Retails for $69.99