M2 stylus with 0.6 mm diameter ruby ball, stepped carbide stem, and 3.0 mm diameter x 6.0 mm long stainless steel base. Minor stem diameter is 0.4 mm; major diameter is 1.0 mm. Overall stylus length is 20.0 mm. Stylus weight is 0.36 gram. Compare to Zeiss 626112-0060-020.