About Acetate Type D|Cellulose acetate, Type D formulation. A specific grade of cellulose acetate with particular hardness and toughness characteristics. See Acetate for general properties.
About Sheet|Thin flat stock, generally under 3/16", used for stamping, bending, shearing, and laser/plasma cutting. It's the starting material for enclosures, panels, brackets, and formed sheet metal parts.