Try Square Parameters
>Proportion:2970-3070kg/m3
>Compression strength:245-254kg/mm2 
>Flexible grinding capacity:1.27-1.47N/mm2
>Coefficient of linear expansion:4.6×1-6℃
>Water absorption 0.13% 
>Shore hardness HS: more than 70.
>Precision has 000. 00, 0, 1 grade. 

Usage: Measurement for PerpendicularityMaterial: Granite Origin: China                           Our products are widely exported to the Australian, New Zealand, Vietnam, Thailand, South Korea and England, Germany and so on.PS: We also can produce as customers' request or drawings.