The STABILA Type 196 Jamber Set with Type 80 T, featuring 78" Type 196 level and 24"-40" Type 80 T Extendable Level. The 78" level is designed to fit in a standard 80" door opening. This allows the contractor to plumb down the jamb lets and eliminate bows in the frame. The set comes with a new header level, the 24"-40" Type 80 T Extendable Level. The 80 T fits most door openings found in residential construction. Achieve a perfect fit for headers by locking the 80 T to the exact door size using the measuring scale on the level.