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1. Grit Size 12#-18# Al2O3 98.5 %Min. Na2O 0.50 %Max.
2. Grit Size 90#-150# Al2O3 98.5% Min. Na2O 0.60% Max
3. Grit Size 180#-220# Al2O3 98.2% Min. Na2O 0.70% Max
4. Grit Size 240#-800# Al2O3 98.0% Min. Na2O 0.80% Max
5. Grit Size 1000#-1200# Al2O3 97.5 % Min. Na2O 0.90 % Max
