EM-Tec FV20 short brass SEM stage adapter pillar only, for FEI with M4 screw, 20mmxM6F

Hitachi HV40 older style T-base SEM stage adapter assembly, compatible with S-4700, S-4500, S-4300, S-42300, S-4100, S-4000, S-800 FESEMs and S-3600N SEM