Riccar 8900 Series Pleated Hepa Media Filter, Riccar part # RF89-2 (1 Pack)
Genuine Riccar HEPA Filter w/Rubber Frame 8900 Series Also Will Fit Simplicity Models 7700, 7750, 7850.  HEPA MEDIA traps 99.97% of dust mites, allergens and more.  Genuine Riccar product for Riccar 8900 series upright vacuum cleaners