Aluminum

[Mr. Mac]

Mike Martus gives the official OCCRA answer but I can tell you this because it's all been worked out before:
We have no way to monitor where you buy things, so we are not going to try to restrict where you purchase the materials you need. However, you are reminded of the intent of the rule that limits purchases of things like aluminum to types that are readily available to all teams. Make sure you look closely at the Additional materials list in the rules: if what you want is not on that list, don't use it. If you buy from a store like Home Depot or order from a company like McMaster-Carr, you can meet all your needs and everybody has equal access to it.