Holmes HAPF37 HEPA Filter.

Holmes HAPF37 HEPA Filter is a Genuine OEM Holmes Filter.
HAPF37 HEPA Filter fits HAP291, HAP2914.
Holmes HAPF37 HEPA Filter traps all microscopic allergens and dust.
Guaranteed filter efficiency is over 99.97 % at 0.3 micron.
Filter Dimensions, inch. 12.5 (Diam.) x 5.5.
Filter's lifetime: 1 to 2 years under normal residential conditions.
Microban anti microbial and anti bacterial filter protection.
Holmes HAPF37 HEPA filter comes one filter per pack.