Central ducted vacuum cleaner system flap valve backing plate for mounting inlets onto Gyproc plaster board.
It's the symmetrical metal plate without the thick, extra part on the bottom. That thick part is for when it has to be a-fixed onto a stud wall.
As it's light, maximise the saving on postage and buy some of the related parts below, such as dustbags and the filters or a new floor tool.
At the moment, standard postage within Australia is capped at a maximum of $20!
We at TVD carry out in-home repairs on built-in ducted vacuum systems in the Perth area from $135, call 08 9362 6044