At the rate we are going in electric racing, we'll probably need them for 19 turn motors soon, lol.
Some people have contacted us with questions about the Wire Heat Sinks: They are made by MuchMore Racing and available in black, blue, and purple. As with most of the stuff made by MuchMore, the black ones sold out quickly, but we still have some left in blue: Wire Heat Sink - Blue
And, to reiterate, the anodized surface is non-conductive. Unless you strip the anodizing off, you should not have any problems with the heat sink shorting out your motor or ESC.