M3 XXT stylus with 1.0 mm diameter silicon nitride ball, stepped carbide stem, and 5.0 mm diameter x 9.0 mm long titanium base. Major stem diameter is 1.0 mm, minor diameter is 0.8 mm. Overall stylus length is 31.0 mm. Stylus weight is 0.77 gram. Compare to Zeiss 626103-0045-031.