NilfiskCFM127 and the NilfiskCFM137 and the NilfiskCFM S2 and the NilfiskCFM S3 industrial vacuum cleaner Nomex spark resistant filter for 460mm diameter containers. (This picture is only for illustration) These are used for "hot work" in such as bakeries and animal crematoriums
This will also fit the Blastrack BDC-1216.
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!