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

ModelCapacityAmount 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-R69 lbsCoarse…………………..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.