This Bernina Hepa Filter fits all Bernina 6400, 6500, 6600, 6700 Vacuum Cleaners.
The earlier modesl, 6400 thru 6600 has a micro filter with a cover. This HEPA Filter can replace those filter and the cover can be discarded which gives you better filtration and a new front cover every time !!
This filters life expectancy is approximately 1 Year