Keep your air conditioner and furnace in top condition with these 10x20x1 MERV 8 Pleated air filters from Filters Delivered. Designed to capture contaminants like pollen, dust, dust mites, lint, mold, and pet dander, these filters are made with Microfiber filter media and feature Electrostatic Filtration Technology. The 1" Depth filters have a Filter Life of 3 Months and come in a pack of 4. They are suitable for use with air conditioners and furnaces and have features like Humidity Resistant, Dust Resistant, Moisture Resistant, Mold Resistant, Heat Resistant, Antimicrobial Resistant, and Rust Resistant. These filters have a Filter Style of Pleated and a Filter Format of Pleated. The Filter Frame Material is made of Paper and Galvanized Steel. They are made in the United States and have Resistance Properties of Antimicrobial Resistant. The California Prop 65 Warning for Formaldehyde is included in the description. Keep the air in your home clean and fresh with these high-quality air filters.