Thanks everyone for the tips.
It finally arrived today, and I was quite surprised by what I got. In that link I included earlier, there's no sense of scale to show how big the bar is. I was expecting something small, maybe three to four inches long. But this bar is enormous! At least eight, if not ten inches long! Is that how they all are, or is this place just selling super-size bars for some reason? It also makes me wonder how often I'll need to reapply the compound to the belt, because unless it's frequently, it seems this bar would last forever!