NilfiskCFM 3707/10 and 3907 560mm container diameter 16 pleat standard main filter Formerly Pn. Z8-17081
The one shown in the picture, is actually the oversize 18 pleat for the smaller CFM127 and NilfiskCFM137
The photo of the lable, however, is from a CFM 3707/10 vacuum.
At the moment, as standard postage within Australia, is capped at a maximum of $20, maximise the saving on postage and buy some of the related parts below, such as dustbags and a new hose, or a new floor tool and some other accessory!