1, material is aluminum film, color uniform, spherical beautiful2, You can choose Digital3, when the inflation is completed, please put the ball to pinch flat, the ball comes automatically sealing glue!"Why the balloon cannot float,Our shop sells a new non-inflatable balloon. The air pump is filled with air, so it is not flying up. If you need to float, please buy helium. Helium can let the balloon floating in the air. Only 40 inches balloons.