Detex 90KRx7 – 7′ Keyed Removable Mullion


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  • Used to adapt a double door into two single doors
  • For use with non-fire-rated rim devices
  • Mullion can be cut down to size in field

The Detex Keyed Removable Mullions are very durable, low-cost mullions designed for use with rim exit devices on standard and fire-rated pairs of doors. The unique design of the latching head allows the mullion to be removed in seconds with one key turn, and then to be snapped back into place without needing the key.


  • For use with Advantex®, Value Series® & other rim exit devices
  • Mullion can be removed in seconds with one key turn, and easily snaps back into place without needing the key
  • Cylinder located inside the building to prevent tampering
  • Easy retrofit application
  • Small profile base plate prevents interference when moving objects through doorway
  • Easily adapted to any double door application



Part Type



1-1/8" Rim Cylinder (Sold Separately)

Mullion Tube

11 gauge, 2" x 3" steel mullion tube

Buy American Act Compliance

Meets Buy Amercian Act – Made in USA


689 Aluminum

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