NilfiskCFM industrial vacuum cleaner 40mm x 500mm steel crevice nozzle for heavy duty cleaning in gaps and crevices and around spillage points.
It's similar to the 50mm version pictured in the foreground of the photo.
It fits into the 40mm rubber or plastic hose cuff. It would usually be used with NilfiskCFM 118 industrial vacuum cleaner
At the moment, standard postage is capped at a maximum of $25 within Australia, so maximise the saving on postage and buy something in the related parts below!