This vintage dental dispersion system is a unique piece made of fine silver weighing 5 troy ounces or 142 grams. The item is rare and STILL FACTORY SEALED in its original packaging, making it a great addition to any silver collection. The composition of the item is pure silver, with no other metals added. It is designed for use in dental procedures, but can also be used as a collector's item. The unit type is in ounces, making it easy to measure and calculate its value. This item falls under the categories of bars & rounds, silver, bullion, coins & paper money. Fire away any questions one may have!