and the and the  and the  as well as the  and the  and the three phase industrial vacuum cleaner and the and the main filter shaker knob kit. It screws onto the threaded rod.

Shaking the main filter will return full suction to the machine, should fine dust begin to clog the surface area.

In the main photo, it's in the centre of the picture, by the bottom of the motor that's been removed.

At the moment, standard postage within Australia is capped at a maximum of $25, so maximise the saving on postage and buy some of the related parts below!