Light-weight, non-reflective, hard anodized aluminum. Light Weight, Non-reflective, hard anodized aluminum. Stronger material is light weight,but wears long. Slim storage keeps forms dry and protected. Smooth outer lid provides hard writing surface prevents imprinting on carbons below. Overall size 8-1/2x12x1/3table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }