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Steel channel iron mullion in removable design, for fire rated openings up to 8′ (244cm) length. 2″ x 3″ (51mm x 76mm) square design. Malleable iron top and bottom retainers included.
Aluminum mullion in removable design. Includes 511 top retainer and 502 bottom retainer. Available in 8′ (244cm) and 10′ (305cm) lengths.
A keyed removable mullion from Von Duprin now carries the UL fire label for openings up to 8’0″. It delivers single-door performance and security on double fire-door applications.
