The soundboard blank arrived very quickly and was well-packaged. On first glance it is obvious that this is not standard 1/8" Baltic birch, but something much higher quality, and something much stronger. Standard Baltic birch ply of this dimension has one thick central ply and a much thinner face and inner veneer only. This "aircraft grade" plywood has multiple thin plies throughout, with no voids, no knots, just strong and clear overall. This is what is needed for soundboards!