Wide and vibration-resistant column of aluminum tubing with dull-black anodized surface and cm and inch scales. With mount and fastening device for copy arms. Rack-and-pinion height adjustment by hand crank. Additional fine drive with 1:10 step-down transmission for super-fine adjustment. Counterbalance by build-in scroll spring. Cross section of column: 2.8 x 1.4" (70 x 35 mm). Height: 40" (1 m)
