3/8" Thread, 4-1/4" OAL, Inline Sight Glass & Flow Sight MPN:F153

The pleated air filter with a Merv 4 rating is designed to protect general living areas from particulate contamination with an efficiency rate of up to 75% on particles as small as 1-3 microns, making them ideal for HVAC systems installed in schools, hospitals or office buildings where maintaining clean indoor air quality is a priority. Manufactured using non-woven fabric material that is resistant to chemicals and won't release fibers while being temperature resistant up to 200F, these filters offer long service life with excellent dirt holding capacity for reduced energy consumption saving you money over time. With their large surface area offered by the pleated design that ensures better airflow, they help improve overall indoor air quality keeping allergens and contaminants at bay in most common residential or commercial applications. Easy to install and readily available at competitive prices, these versatile 16 x 20 x 1-inch pleated filters are perfect for any existing HVAC systems requiring efficient filtration of particulate matter.