Discover the robust Resideo 958-2 Overhead Door Magnetic Contact Sensor, designed to enhance your home security seamlessly. This sensor features a SPDT switch (Form C) and is expertly sealed with epoxy to guard against moisture and impact. Its unique 'Shock Absorber' design ensures the reed is protected from any flex or housing damage, maintaining durability and reliability. With a standard gap of 2-3/8" (60 mm), it's ideal for a variety of overhead door types. Upgrade your home's safety today with Resideo's trusted technology. Don't miss out, secure your overhead doors with this top-notch sensor!