M2 stylus with 2.0 mm diameter ruby ball, 1.0 mm diameter carbide shaft, and 3.0 mm diameter x 5.0 mm long stainless steel base. Stylus length to ball center is 15.0 mm. Stylus weight is 0.36 gram. Compare to Zeiss 602030-8009-000 and Mitutoyo K651247.