Highly accurate gages for setting and checking other gages.
Features:
Dimensional stability, smooth surface finish, uniform hardness and assurance of accuracy.
Each set comes complete with Certificate of Inspection & etched serial numbers.
Includes:
(1) Each of blocks: 1.0mm, 2.0mm, 2.25mm, 2.5mm, 3.0mm, 5.0mm, 10.0mm, 15.0mm, 25.0mm
see link below for further details:
https://www.penntoolco.com/starrett-webber-rs9-ma1-9-piece-rectangular-metric-grade-2-precision-gage-block-set/
Asking $175 retails for over $500 USD