This is the REVO® SFA2 0.5 Sin Artefact #A-5764-0061. There are three SFA plates. Each one is supplied with screws for fixing to a single or triple SFAH artefact holder.  The SFP2 gain is set using the SFA1 – 3.0 SIN fitted to the appropriate artefact holder accessory.  It must be mounted on Renishaw’s MRS and MRS2 rack systems.