Hollow structure This piece is made by hand from 100% sheet metal; cut into sections and welded together to create a hollow three-dimensional form. If it is pure silver, the sheet metal is handmade. The silver melts and rolls into a plate shape. colour: DR: Dirty brass. This color can be achieved by burning the metal to the point where it releases impurities and colors itself. The patina occurs from the inside, and no chemicals are added to the surface. Material: brass Family: Super reduction Series: Series 6 Tag: 4 holes