Empty first aid boxes are offerd in pastic or metal to replace damaged first aid boxes when the first aid supplies inside are still in tact.  The empty first aid boxes come in metal and plastic and in a selection of sizes.  The metal first aid boxes are durable and needed at times to replace damaged plastic first aid boxes that are used in tough conditions, especially at constrution sites and areas where they are prone to fall.  The plastic first aid boxes are still very durable under normal conditions and offer a lighter alternative when an empty first aid box is needed.