BestAir E2R, Emerson HDC-2R Replacement, Paper Wick Humidifier Filter, 6.5" x 5.5" x 11.5" Specifically designed for use with your humidifier Made in the USA Antimicrobial Wick Filter Traps impurities in the water Up to 150% stronger Aluminum reinforcement Made in the USA Traps impurities in the water Up to 150% stronger Aluminum reinforcement