CleverDelights 4" round aluminum blanks are great for industrial repairs, crafts, stamping, engraving, and etching projects. 1 pack. Thickness: 14 ga / .063" / 1.6mm. Raw 5052 H32 aluminum material. This 4 inch raw aluminum disc has been deburred. Made in the USA. Please visit our store for our full selection of aluminum discs and tags. Thanks for shopping with us!