Central ducted vacuum cleaner system 50mm PVC pipe flanged Tee coupling to 2 switched flap valves.
This would be used say in a stud wall where there needs to be an outlet on each side of a wall, such as in a hotel, hospital or other commercial premises.
As it's light, maximise the saving on postage and buy some of the related parts below, and maybe 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