The Roadworks Peterbilt 15 Inch Diameter Preferred Fit Premium Donaldson Air Cleaner Brackets are a practical and reliable solution for your truck's air cleaning needs. Made from stainless steel, these brackets are 25.187 inches tall and available for both front and rear installation. With a twist-off top and concealed bolts located underneath, they offer easy access for maintenance. Designed specifically for Peterbilt 379 and 389 models from 2005 to 2011, these brackets provide a secure fit and are available with 2" round flat hole. Please note that they do not fit regular or other premium Donaldson models.