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 988 Surface Bolt Kit HC980 & 12-HC980 Removable Mullions EL980 Electrified Keyed Removable Mullion