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 980S & 12-980 Removable Mullions 980 & 980A Removable Mullions L980 & L980A Keyed Removable Mullions