12 mm x 4 x 8 ft. Fir Plywood - AB Marine Grade is a premium quality plywood designed for applications where durability and moisture resistance are essential. This marine grade plywood is expertly crafted to be of gaps and voids in every layer, using a special waterproof glue that keeps the layers firmly bonded even when exposed to water. Made from harder woods like Douglas Fir or Western Larch, it exceptional resistance to delamination, bubbling, buckling, and warping. The clean, void- edges make it an i choice for marine projects and other environments with high moisture levels. Its robust waterproof construction ensures it outperforms pressure-treated plywood in longevity and reliability. Model Number: 1/2MARINE