Falcon KR-4023 Keyed Removable Steel Mullion for 19/20/24/25 Series Rim Devices


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  • Used to adapt a double door into two single doors
  • For use with non-fire-rated rim devices (19R, 20R, 24R, 25R)
  • 86″ Length – Mullions can be cut down in field

KR-4023 keyed removable steel mullions are for use with Falcon rim devices on double door openings

  • Requires 1-1/4″ Mortise Cylinder w/ Straight Cam (sold separately)
  • 2″ x 3″ x 86″
  • Increased security and tighter closure
  • Minimizes door warpage and sag. Regulates the flow of in-and-out traffic
  • Falcon removable mullions are easily removed and reinstalled for full width access
  • Rim devices are used on both leaves, attaining a perfectly symmetrical opening
  • The mullion assembly consists of a mullion, top and bottom mounting brackets and a screw pack
  • Mullions may be cut on the job for doors under stock lengths
  • Strikes are not furnished with the mullion


Part Type




Fire Rating



1-1/8" Mortise Cylinder Required with Standard Cam (Sold Separately)

Buy American Act Compliance

Meets Buy Amercian Act – Made in USA


689 Aluminum