CENTERPIECE BASE SILVER HOLOGRAPHIC Air-filled balloon centerpiece weight. Silver foil holographic centerpiece base for air filled balloons. Fill the balloon with air and attach to the base viola no helium required and an a cost effective way to get a great look for your party! Size: 3"H x 3 1/2"W. Base is 2"W *Balloon not included however shop our many foil balloons to fit your theme for your event!