This is the M2 steel styli #A-5555-0316. It has a stainless steel base and stem with a ruby ball.
Thread mount | M2 |
Ball Diameter (DK) | 8.0 mm |
Length (L) | 13.0 mm |
Stem Width (DS) | 3.0 mm |
Base Width (DG) | 3.0 mm |
Stem material | Stainless Steel |
Mass | 2.0 g |