ERGOTEC Stem Octopus 2, ø 25,4 mm, adjustable, 180 mm shaft length, 25,4 mm handlebar clamp Level 4, 0° till + 50°, aluminium 6061 T6 approx. 445 g 100 mm.ERGOTEC Stem Octopus 2, ø 25,4 mm, adjustable, 180 mm shaft length, 25,4 mm handlebar clamp Level 4, 0° till + 50°, aluminium 6061 T6 approx. 445 g 100 mm.