M5 stylus with 0.3 mm silicon nitride ball, tapered carbide stem, and 11.0 mm diameter x 10.0 mm long stainless steel base. Minor stem diameter is 0.2 mm; major diameter is 1.0 mm. Overall stylus length is 15.0 mm. Stylus weight is 5.54 grams. Compare to Zeiss 626105-5245-015.