M3 XXT stylus with 0.3 mm diameter carbide ball, stepped carbide stem, and 5.0 mm diameter x 9.0 mm long titanium base.  Minor stem diameter is 0.2 mm, intermediate diameter is 0.5 mm, and major diameter is 1.0 mm.  Overall stylus length is 24.0 mm.  Stylus weight is 0.58 gram.