Bionaire BWF100 Replacement Wick Filter 2-pack.

Bionaire BWF100 Replacement Wick filter is a Genuine Bionaire Filter
Bionaire BWF100 Wick Filter fits BCM630, BCM645, BCM646, BCM655, BCM657, BCM658, BCM740B, BCM740W, BCM4600, BCM4655, BCM5520, BCM5521, BCM5555, BCM6000, BCM6010, BCM6610, BCM7203, BCM7204, BCM7205, BCM7207, BCM7255, BCM7305, BCM7307, BCM7308, BCM7309, BCM7510, etc.
Bionaire BWF100 Wick filter is infused with "Arm & Hammer" baking soda to help absorb household odors.
The anti-microbial agent inhibits growth of mold, mildew and odor-causing bacteria.
Bionaire BWF100 Wick Filter absorbs minerals and calcium from the water and has to be replaced to keep the performance of your humidifier at its peak.
Bionaire BWF100 Filter's Lifetime: 1 to 2 months.
Bionaire BWF100 Wick filter is interchangeable with Bionaire BWF100P PermaTech permanent wick filter.