Kits are designed for 20" reusable balloons. Tough superflex Fiberglass Balloon holders eliminate the hassles of filling balloons with helium. Kits include 1 Window Clip, 1 Balloon Adapter Clip, and 1 Balloon Pole.Everything you need to attach to car window except the balloon - sold separately. Attach to the vehicle in the same way as our vehicle window flags, so they can be quickly mounted and removed just by lowering and raising a side window. Plastic and fiberglass construction.