C-Clamp A universal clamp for a variety of structures and transitions to vertical extension columns. Features: Clamps to any structure up to 2.75" (70 mm) OD (including 2" x 4" structures) and includes an opening for 1.5" NPT extension column Provides quick, versatile installation of presentation equipment and allows cable routing through the column Great for mounting equipment in exhibit booths Specifications: Clamp Range: up to 2.75" (70 mm) Weight Capacity: 250 lbs (113.6 kg)