Genuine Nilfisk GD5 Commercial backpack vacuum cleaner packet of 5 white paper dustbags with adhesive seal.
They will also suit the GD10, currently not sold in Australia.
They actually seal better if the adhesive seal is exposed by removing the white cover paper.
This machine is also called The Adgility 6XP. The Back Vac 6 and The Comfort Pak 6.
It comes complete with the white round pre-filter for the motor.