This pack is made to match any of the below Thumler's Tumbler recommended grit amounts:

Model

Capacity

Amount per Barrel

Model T, A-R1
Model T-2, A-R2
1-qt, barrel, 3 lbs
2-qt, barrels, 6 lbs
Coarse.......................4 oz.
Fine.............................4 oz.
Prepolish.....................2 oz
Polish..........................2 oz
Model A-R6 9 lbs Coarse.......................8 oz.
Fine............................8 oz.
Prepolish.....................4 oz
Polish..........................4 oz
Model A-R12
Model B
12 lbs
15 lbs
Coarse........................1 lb.
Fine.............................1 lb.
Prepolish......................1/2 lb.
Polish...........................1/2 lb

The above grit amounts are what we use here at The Rock Shed when we tumble, but some tumbler manufacturers  recommended using the same amount of pre-polish as coarse and fine. For that reason, we offer additional grit pack choices.