L980 & L980A Keyed Removable Mullions Intended for general usage and non-fire rated applications, the lockable L980 & 980A Removeable Mullions are constructed of extruded aluminum and ideally suited for store fronts and schools. Downloads Catalogs Instruction Manuals Promotional Sheets Product Templates Parts Manual Interested in this product? Contact Us Related products 980 & 980A Removable Mullions 12-HD980 Heavy Duty Steel Mullion EL980 Electrified Keyed Removable Mullion