Not much for the money. I literally have a square no larger than 4 x 4 inches. It's pretty hard to work. Seems to stick to my hands more than the surface I'm working with. Has the consistency of marzipan. Were the price lower or advertising. more descriptive, I could check better. However, besides my application of this thing, there is no thermocouple and it is not sufficient for use as a TIM processor. They clearly have a monopoly on this stuff, but doing it so sparsely and with so little information other than a few rave reviews on random forums is false frugality. It would sell much better if more people could experience more of its hyped performance.