M5 stylus with 0.3 mm diameter ruby ball, tapered carbide stem, and 11.0 mm diameter x 25.0 mm long tapered stainless steel base. Minor stem diameter is 0.2 mm, major stem diameter is 1.0 mm. Stylus length to ball center is 30.0 mm. Stylus weight is 9.95 grams. Compare to Renishaw A-5003-5211.