with Square Pillar & Special Drum Type Verniers MODEL : TMS-12 SPECIFICATIONS: Horizontal Scale X Vertical Scale Z Focal Length of Objective Ramsden Eyepiece Cross Wire Base Leveling Screws Least Count : : : : : 0-18cm 0-14cm 75mm (3”) 10x Fine quality cross line glass graticule : Heavy cast iron base : One xed and two moveable : 0.