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Mullions allow rim exit devices in double door applications. 


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Mullions are vertical supports in an opening that provide single door performance in double door openings that utilize rim devices. They are manufactured from either aluminum or steel and are available in three different configurations: keyed removable, removable and blank.



  • Can be used with an angle plate, 154 stabilizer and MT54 storage kit
  • Steel mullions are available in finishes  628 and  695
  • Aluminum mullions are available in finishes  606, 612, 628, 313 and 315 

UL10C listed

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Did You Know?

Von Duprin has hundreds of possible configurations for any type of opening, giving you flexible and modular options.

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As part of Allegion’s family of pioneering brands, Von Duprin benefits from the strength, efficiencies, resources, and integration from a global power. In turn, we pass those advantages on to you.

Allegion helps keep people safe and secure where they live, work and visit. With more than 30 brands sold worldwide, we specialize in security around the doorway and beyond. It’s the power of one.