CFS – 4.8" x 15.75" Activated Carbon Pre-Filters Compatible with FLT4825 HEPA Filter and AC4800 Series (Filter B) – Charcoal Air Filter Sheets – Fresh and Filtered Indoor Air – Black – 8 Pack

CFS – 4.8" x 15.75" Activated Carbon Pre-Filters Compatible with FLT4825 HEPA Filter and AC4800 Series (Filter B) – Charcoal Air Filter Sheets – Fresh and Filtered Indoor Air – Black – 8 Pack