I decided to add two "Haplopelma minax" (big blacks )1 1/2-2 1/2 inch slings to an amphibian order to round out the order. Instead I got two adults! So for sure an upgrade. Nice surprise. However, I was not mentally prepared to deal with an angry adult yet. And the housing I had prepared will not be large enough. But it's too late to run to the pet store to get bigger containers tonight. So just a temporary problem. Great communication and prompt service as well.