This is the PH1 #A-1049-1795-RBE
RBE (Repair by Exchange)
PH1 is a small shank mounted manual probe head with movement in the A and B axes, with limited over travel protection. The PH1 probe is offset from the mounting shank Z axis.
A-1049-1795-RBE | PH1 Probe Head | RBE: Repair by Exchange | Renishaw