They would be 20/30amp most likely, you can tell amp rating by the width if the LOAD spades, 1/4" wide are 30amp, most common Ford relays.
When you get up to 60-80amps the LOAD spades are quite wide, easy to see the difference just by looking.
Just google 70 amp relays and you will see the difference, they have "normal" size Coil spades and much wider LOAD spades
Example here: http://www.ebay.com/itm/5X-CAR-VEHIC...-/172194319624
You can easily see the difference in spade width
And just a heads up for E-fans, they can have a 30amp rating but a startup rating of 60amp, so watch out for that