Hi ceasar2k,
You can see some comments about the Nature’s Sleep foundation here and here and here and here and here and here and here and here and in the foundation post here.
The slats are 1x3’s which means that they would generally be .75" thick and 2.5" wide. Their site says that the queen is 60" x 80" but I don’t know if these are exact measurements. If you call them they would probably give you any exact specs you need or hopefully a forum member that has one will see your post and measure their foundation and post the measurements here.
Phoenix