M5 stylus with 6.0 mm diameter ruby ball, 3.5 mm diameter carbide stem, and 11.0 mm x 10.0 mm long stainless steel base. Overall stylus length is 54.0 mm. Stylus weight is 12.61 grams. Compare to Zeiss 600342-8026-000 and Renishaw A-5555-0027.