+3 220 STEP2 silica carbide single shot - phase grit 400000014333 $9.95 Step 2 out of 4 for tumbling In stock Quantity: 1 Add to Bag Product Details 220 silica carbide grit (single shot) for up to 1.5Lb tumbler. Rent a tumbler and get a Four-Step rock tumbling grit and polish combo for 50% off. Save this product for later Favorite