This 4.5'' BLUE glass ball comes with copper rings that enable a person to use them in different ways for different items.They are mostly used for 5/8'' weathervane and lightening rods.You can ask any questions if you want,, and i will respond so that i can help you achieve what you are setting out to do.PLEASE NOTE; the glass balls are not perfect,they have small bubbles,blemishes, streaks,ect in them.They are blown and /or poured glass and each one is unique.

also if you want one to fit a 3/4'' 0R 1/2'' rod message me when u buy it.these are mostly used on lightening rods and full size weathervane rods (3/4'')