What size is the plug on the power supply for expansions?

[dapg8gt]

I swamped two 12v power supplies into my salt mixing container when they fell off the shelf and now I need to use my pH expansion.

Does anybody know off hand what size the plugs are on them? And if they are Center - /+?

I know I could probably splice the plugs onto other PS but I'd rather just buy a new one..

Thanks Daniel

[rimai]

5.5mm x 2.1mm center positive