New plywood volume BAT 3M member of the BAT series. Perfect for modern routesetting adding small chips over them. Our plywood volumes are made of 18mm, 13 layer birch plywood, screws and glue. No nails or clips are used. Fixing holes are reinforced with metal washers to improve durability. Easily washable with brush or pressure washer from time to time. New 3 resin layers surface with the finest grain. Smooth grip, longlife lasting.