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 0.5 mm, major diameter is 1.0 mm. Overall stylus length is 25.0 mm. Stylus weight is 5.51 grams. Compare to Zeiss 626115-0080-025.