The Filtrete Micro Allergen air filter size 17.5×23.5×1 MERV 11 (6-Pack) captures everything from dust and pollen to the tiniest allergens like smoke and pet dander – without draining your wallet. The Micro Allergen goes to work every time your heating and cooling system kicks on. It’s like having an expensive whole house air purifier, only cheaper! Make sure this fits by entering your model number. Model number: FILTRETE_MICRO_17_5x23_5x1_6_PACK Country of Origin: Mexico Item Dimensions: 17.25″L x 0.875″W x 23.25″H Brand name: Filtrete