Mixtures of ceramic shapes are the latest thing in rock tumbling! They do four things really well. (1) they act as a cushion (just like plastic pellets) but they are also hard, so (2) the...
This is 8.0 pounds of white Tin Oxide powder, at $44.31 per pound, in a 1-gallon plastic container. Unfortunately, this is a "Rare Earth Mineral" and is in high demand for high-efficiency...