This grit refill pack is pre-measured for a 3-pound rotary rock tumbler. It contains the following grits for a four-stage tumbling/polishing operation:
- 4 oz Coarse: silicon carbide 60/90 grit
- 4 oz Medium/Fine: silicon carbide 150/220 grit
- 2 oz Pre-polish: aluminum oxide 500+ grit
- 1 oz Polish: aluminum oxide super fine
This grit refill pack is enough to polish 3 pounds of rock.
WARNING: This product can expose you to Respirable crystalline silica, which is known to the State of California to cause cancer.
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