TXP polish is sold at a discount when you purchase a 5 pound bag. Please use only 1 tablespoon per 10 pounds of stones and media in your rotary tumbler. If you are using a tumbler barrel which will hold 3 pounds of rock and or media, use only 1 teaspoon of TXP for the polishing stage. Using more than suggested amount will slow the polishing stage according to the manufacturers. TXP polish is a micron sized aluminum oxide polish, 3.0 micron or 8,000 mesh. It has a general spherical shape and it is an excellent polish and is recommended for tumbling in a rotary or barrel tumbler. Stock TXP-5. Since the Stock of 5 lbs. of TXP will last a very long time, a one pound sample of TXP is also available on the web site.