EM-Tec HJ25 Hitachi M4 adapter for holding the Ø25mm JEOL stubs. Can also be used to hold the Hitachi Ø25mm stub or Ø25mm/1inch metallographic mounts. Set screw is used to secure the cylinder stubs. Machined from vacuum grade aluminium stubs. Overall size is Ø34x10mm. Includes allen key.