See a demonstration in the video further down on this page

Starmix uClean LD-1432 HMT

which functions as a pre-filter

15999Siemens VM 20000…20999Siemens VM 30000

OBH Nordica Here vacuum cleaner: 7215

Numatic filter TriTex VC3012 See a demonstration in theThis filter fits Numatic Henry, Fnuggi, Hetty and many more. It comes with a ring and a double bottom. Fits all these models: Numatic Henry, Hetty Blue Vac machines Numatic HZ 250, HZ 370, HZ 750, HZ 750, AVQ250 21, AVQ250 21, HZ 900, HZ 900, HZ 200, HZ 200, WV 370 2, WV 370 2, WV 380 2, WV 470 2, WV 470 2, AVQ380 21, AVQ380 21, George GVE370, George GVE370, Charles CVC370, Charles CVC370