This 2.5",, 4.5'' GREEN glass ball set comes with 3/4'' hole copper rings that enable a person to use them in different ways for different items.They are mostly used for the common weathervane and lightening rods. note that the 2'' ball sits on top of the bevelled portion of the 3/4'' rod.These balls are not returnable,they are blown or poured glass and are not Perfect.each one is unique.and any tiny imperfections will certainly not be seen from the ground..PLEASE NOTE IN SOME CASES YOU WILL HAVE TO GLUE OR REGLUE THE COPPER CAPS ON THE WAY THAT YOU WANT,ITS EASY.HOWEVER THEY COME GLUED ON AS SHOWN.