The technical specification:

     1. The density≥1.80g/cm3

       2.  Water absorption rate≤0.15%

       3.  Bending strength≥400Mpa

       4.  Compression strength≥98Mpa

       5.  Withstand voltage along laminas at normal condition 5 min  ≥25KV

       6.  Withstand voltage across laminas at transformer oil 90±2oC   5min   ≥12MV/m

        Note: The diameter according to customer's order.