This 4.5'' GREEN glass ball comes with copper rings that enable a person to use them in different ways for different items.They are mostly used for the common 3/4'' weathervane and lightening rods.

Also note these glass balls have different imperfections in them,tiny bubbles,waves, streaks ect.None of which will be seen  unless inspected up close.They are all unique as they are blown or poured glass.