Moisture content: 

 <=10%

 Density:

 0.75Above cm3

 Wear value:

 <=0.1g/100r

 Impact intensity:

 40kj/M2

 Elasicity coefficient:

 >=5000Mpa  >=7948Mpa

 Static tune intensity:

 >+24Mpa >=75.8Mpa

 Angularity:

 <=1%

 Thickness common difference:

 +-0.5mm

 Thickness expansion rate:

 <=8%