Reusable Parts are a common crafting material in Diablo III, obtained by using the Blacksmith to salvage common weapons and armor. White and gray items will yield 7-10 Reusable Parts when salvaged. They can be stacked up to a maximum of 5000. Reusable Parts are account bound. It is used in crafting rare items and legendary weapons and armor, as well as enchanting and transmutations.