M5 stylus with 0.8 mm diameter ruby ball, stepped carbide stem, and 11.0 mm diameter x 10.0 mm long stainless steel base. Minor stem diameter is 0.6 mm; major diameter is 1.0 mm. Overall stylus length is 32.0 mm. Stylus weight is 5.79 grams. Compare to Zeiss 602030-8060-000 and Renishaw A-5555-0052.