This is the star styli #A-1034-0124. It has an M8 thread, stainless steel stem, and a ceramic ball including certificate.
|Overall length (L)||145.0 mm|
|Base Width (DG)||24.0 mm|
|Ball diameter (DK)||30 mm|
A-1034-0124 | M8 stainless steel Datum sphere with ceramic ball | M8 | Renishaw