The scale or grid is chrome deposited centrally on a glass disc mounted in a black anodised aluminium slide mount 76mm x 25mm x 1.5mm thick. The metal mount gives these stage micrometers greater durability than those of all glass construction. These products are supplied in a plastic case with foam insert.
Available in transmitted and reflected (incident) light versions. All transmitted light stage micrometers, except the S48 and S18, have a No.0 cover glass optically cemented over the image.
This range of stage micrometers do not have unique serial numbers, so technically are not traceable. Many quality inspectors require any calibration tools to have unequivocal traceability, so a stamped or engraved serial number, for this we have our PS range of calibration scales.