Because of its low thermal expansion Granite is an ideal material for surface tables/plates offering a stable and precise work surface . As a result of its good surface hardness it offers a good wear life. Workshops and laboratories like to use Granite surface plates for calibration and measurement, because they provide a solid 2D plane for accurate use of height gauges and similar.Therefore, Granite tables also provide a suitable surface for many other engineering tasks. Features: High rigidity and non-magnetic properties Totally corrosion and stress free Most reliable product for inspection purposes Manufactured to BS-817 (2008) BR4017006 Surface size: 900mm x 600mm, Weight: 180kg Thickness : 100mm