Aerostar 20x20x1 MERV 11 - 4 Count - Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Cold & Flu Germs, Lint, Mold, Pet Dander, Allergy-Causing Pollen, Smog & Smoke JOISTOON use for wardrobe / closet

use for wardrobe / closet dividers

2 sets x hanging racks

Nuts and bolts are included for the installation

the large and easy-to-read LCD display helps you get precise results quickly and easily

This respirator is certified by NIOSH with P100/OV/CL/SD/HC respirator approvals

Aerostar 20x20x1 MERV 11 - 4 Count - Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Cold & Flu Germs, Lint, Mold, Pet Dander, Allergy-Causing Pollen, Smog & Smoke JOISTOON use for wardrobe / closetBrand: Aerostar Color: MERV 11 Features: Nominal size: 20x20x1; Actual size: 19 3 4"x19 3 4"x3 4"; This MERV 11 filter is comparable with MPR 1000 1200 & FPR 7 Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, and smoke Simple to install and a cost effective step towards a healthier home environment. For best results, change your filters every 60 to 90 days but increase frequency to 30 days