Captain's Compass - FLT4825 Filter B, Carbon Pre-Filter (4-Pack) Pre-Cut for GermGuardian FLT4825 HEPA Filter, AC4800 Series - Made in USA $7.99 B00U1N0DNU
CAPTAIN'S COMPASS Precut Filter C 4 Pack for FLT5000/FLT5111 Premium Carbon Activated Pre Filters, GermGuardian AC5000 Series Compatible, Made in USA $13.99 B00U1NFDF8