User Summary: Mountain Battleboards – Megapack (w/grid) is part of the Wildlands wilderness terrain series. The battle boards are 11mm thick making them the same height as the sculpted terrain pieces. The surface is a printed artwork of the terrain with a ferrous metal sheet beneath it so the magnetic pieces can stick to it. The flip side of the board holds four embedded anchor magnets designed to hold the Dwarven Forge terrain trays. This item was initially available as an add-on during the Wildlands Kickstarter. Mountain Battleboards – Megapack (w/grid) comes with these 9 Mountain Patchy Ground 12x12 (w/grid) boards.