M5 stylus, 3.0 mm ruby ball, 1.5 mm diameter carbide stem, 11.0 mm diameter x 10.0 mm long stainless steel base. Overall stylus length is 25.0 mm. Stylus weight is 6.01 grams.
EQUIVALENT TO RENISHAW PART # A-5555-0018 EQUIVALENT TO ZEISS PART # 602030-9010-000