🌟 Elevate Your Air Quality with Glasfloss Filters! Upgrade to MERV 10 for superior air quality! Heavy-duty frame resists moisture and wear. Exact dimensions ensure compatibility with major brands. Perfect for allergy sufferers seeking comfort. Proudly manufactured for quality you can trust. Exact Dimensions Heavy-Duty Frame MERV 10 Rating The Glasfloss 19-7/8 x 21-1/2 x 1 Air Filters (Case of 4) feature a MERV 10 rating, providing an instant upgrade from lower-rated filters. Designed for allergy sufferers, these pleated filters come with a heavy-duty frame and expanded metal backing, ensuring durability and moisture resistance. With precise dimensions, they fit various air handler models, making them a reliable choice for maintaining clean air in your home.