Bionaire 911D Dual Air Filter.

Bionaire 911D Dual air filter is a Genuine OEM Bionaire Filter.
Bionaire 911D Dual Air Filter fits Bionaire humidifiers: W2, W6, W6S, W6H, W7, W9, WC0840.
Bionaire 911D Dual Filter combines HEPA type particle filter and activated carbon filter.
The HEPA type particle filter traps all microscopic allergens and dust at a rate 99.00 % at 0.3 micron.
The activated carbon filter removes household chemicals including cigarette smoke.
Filter Dimensions, inch. 9.5 x 9.5 x 2.0
Filter's Lifetime: 3 to 6 months.
Bionaire 911D Dual Air Filter comes 1 filter per pack.

Bionaire 911D Dual Air Filter is used in the same units with:
 Bionaire 900 Wick Filter