The application of this kit to your 9954 mullion makes removal faster and easier by a single operation of the mortise cylinder. Mullions provide single door performance and security on double door applications. Once the mullion is removed, large equipment or furniture can freely pass through the opening, and the mullion unit will self lock when re-installed, without use of the cylinder key.

Over the years, Von Duprin has been an innovator in many new concepts to the industry. Currently, Von Duprin manufactures the widest range of exit devices and outside trim operations, all designed to meet the needs of architects and building owners.