6.5'' GREEN glass 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.PLEASE NOTE; IN SOME CASES YOU WILL HAVE TO GLUE OR REGLUE THE COPPER CAPS ON.We can also make this fit a 5/8'' rod,just message me when you buy it that you want the 5/8'' rings on it.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.