650A Removable Mullion Constructed of aluminum, the 650A Removable Mullion includes 651 Stabilizers and imbedded Weather Stripping. Downloads Catalogs Instruction Manuals Promotional Sheets Product Templates Parts Manual Interested in this product? Contact Us Related products 980 & 980A Removable Mullions 988 Surface Bolt Kit EL980 Electrified Keyed Removable Mullion