All standard leaves are die cut from .020″ leaded brass engraving stock. They are shipped pre-installed to the acrylic tree tops using 4/40 X 3/16″ brass round head machine screws. When Saxton attaches the leaves to the acrylic top, the clear protective sheeting is removed from each leaf. If we pre-ship the leaves for engraving, the clear sheeting will be left on the leaves for protection.