Flat dieboards: Our quality production can hold flatness tolerances to -0 to +.100. Our flat board thickness is sanded to within +.005/-.015 of your specifications - from the smallest size up to 50 wide by 96 long. Rotary dieboards: Curved boards can be pressed up to 102 in length and diameters of 6 - 22 cut to size and sanded. Best quality beech veneers are used to guarantee the quality.