M5 stylus with 1.5 mm diameter silicon nitride ball, stepped carbide stem, and 11.0 mm diameter x 10.0 mm long stainless steel base. Minor stem diameter is 1.0 mm, major diameter is 1.5 mm. Overall stylus length is 30.0 mm. Stylus weight is 6.05 grams. Compare to Zeiss 626115-0151-030.