M5 stylus with 4.0 mm diameter silicon nitride ball, 2.5 mm diameter carbide stem, and 11.0 mm diameter x 10.0 mm long stainless steel base. Overall stylus length is 64.0 mm. Stylus weight is 9.29 grams. Compare to Zeiss 626115-0401-064 and Renishaw A-5555-3789.