G358, its at 18 percent moisture. It is mill sawn and sanded down to 80 grit sandpaper on both sides, we debarked most of it. This slab came from a tree cut down a year and a half ago, we dug down into the ground around the tree to get the burl wood before we cut it down, this is the bottom of the tree that grows underground. High 3.1/4 inches thick.This is a raw material untreated. We thank you for your business. This item is made of cedar.