Electric Fuel Pump Relay?

I run a Magnafuel 275 with my battery and relay in the front. The wire from the battery to the relay is 10 gauge and 12 gauge to the pump. I think the 12v relay feed wire is 18 gauge, it requires very little amperage to feed the relay.
Thanks, I thought the wire gage was a little thin, I put it in anyways, the old was thin also, still worked, just falling apart...