Clutch Plate: Pre-installed

The motor filter is the first stage in filtration

This allows more debris to be deposited into the clear bin so that less matter goes to the filter

After air is drawn in through 360 degrees of steel ventilation on the sides of the unit it passes through the large particle pre-filter which eliminates any hair

Austin Air Standard Replacement Pre-Filter Dyson DC17 Vacuum Parts Clutch Plate: Pre-installed[custom_html] This is a replacement pre filter for all standard size Austin Air purifiers. As the first stage in Austin Airs proprietary 4 stage filtration process, this filter is design to free air of large particulates such as hair, dust, and dander. Located outside of the main filtration system, it is designed to be removed and vacuum cleaned with ease, thus eliminating costly filter changes. Fits all standard size Austin Air models, including