Our Four-Step Grit Kit is maximized to tumble a wide variety of rough rock -- from soft to hard -- and contains enough grit to tumble 10-14 lbs. of stones.
Step 1 (coarse) is a combination of 60/90 grit 16 oz
Step 2 (medium), 120/220 grit 14 oz
Step 3 (fine), is an alumina based pre-polish 12 oz
Step 4 is a top quality tumbling polish (CPP) with an alumina base 10 oz
For any information on tumbling rough rock we have articles on our Rock Tumbling, Polishing, & Carving page.