Well that's the thing I don't know for sure how much I need but with the links these guys have sent me I think I'm good on the heat shrink now. Like the guy above said I think the shipping costs makes selling between each other pointless.I get mine off eBay .
How much do you need
Yeah I found a diagram that shows all the sizes. 3/4 is the recommended for 1/0.I usually get .75(3/4) from this site: Heat Shrink Solutions: Tubing, Connectors, Guns, Tools and Supplies