Amazon.com: 6061 T651 Aluminum Sheet Metal 6 x 12 x 0.40 Inch Flat Plain Aluminum Plate Covered with Protective Film, Heat Treatable Rectangle 10MM Thick Aluminum Metal Plate for Industrial, Crafting : Industrial & Scientific
200 x 200 x 10mm Square Steel Plate – EZY STEEL
200 x 200 x 10mm Steel Base Plate, 4x Holes – EZY STEEL