This HEPA filter fits perfectly in my Siemens VSZ31455. My vacuum cleaner is now a year old and my furniture was always covered hours after vacuuming with a fine layer of dust. Also, the vacuum cleaner was dusty increasing lately. Have replaced the old HEPA filter against these new and the dust remains where it belongs. In vacuum cleaner. Property me this time also this "Swirl S 67 MP Plus Airspace" bag bought separately. They are cheaper than "Bosch / Siemens Type G plus / dust bag fabric / 4 pieces" but work very well.
