M2 stylus with 1.5 mm diameter ruby ball, 0.7 mm diameter stainless steel stem, and 3.0 mm diameter x 5.5 mm long stainless steel base. Stylus length to ball center is 10.0 mm. Stylus weight is 0.24 gram. Compare to Renishaw A-5000-7802, Carbide Probes 265-1.5R, and Mitutoyo K651013.