Nilfisk 38mm chrome holed steel crevice nozzle for fitting to brush for cleaning vents and louvres etc. Could also be used between pleated filters in bag house. Usually used with 38mm ring brush and most likely with the  and the  and the  and the 

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!