For soft action polishing and deburring, this is a great ceramic abrasive for hobbyists or anyone polishing small parts. Abrasive material: 49.6% silicon dioxide (SiO2); 40% aluminum oxide (Al2O3); 5.5% potassium oxide (K2O); 2% sodium oxide (Na2O); 0.4% iron oxide (Fe2O3); 2.5% calcium oxide (CaO).
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