The Loren Cook 145531 Rubber Isolators with Stud Ends are durable rubber mounting components designed to minimize vibration and reduce operating noise in HVAC equipment. They work by absorbing mechanical vibrations and shocks generated during equipment operation, preventing their transmission to supporting structures. These isolators are commonly used in ventilation fans, exhaust fans... https://www.partshnc.com/145531-loren-cook-rubber-isolators-w-stud-ends