Name: Crown digital balloon Specifications: 40-inch digital 1; Mini-Crown 1; 12-inch Pearl light blue 4, pearl powder 4, 5 inch pink latex 4; 20 grains of dispensing; Magic long balloon a Weight: about 60g Material: aluminum film Features: 1. The material is aluminum film, the sphere has metallic luster, color uniformity, and the sphere is beautiful. 2. It can be used repeatedly. It is convenient to charge and release air. Don't throw it away after using it once. Special tips: (1) when inflating the aluminum balloon, it must be slow. It can be charged by tire pump to 90%, and then blown with a straw to control the air volume so as not to burst. If there are two layers of aluminum film sticking, be sure to stop inflating, gently pull the two layers of aluminum film by hand and then inflate, otherwise it will be easy to damage. (2) sharp objects, dirty ground, direct sunlight and excessive squeezing are easy to damage and burst the sphere. (3) due to the thermal expansion and contraction of the gas, when the temperature falls in winter or winter, the aluminum balloon should be properly inflated; In summer or when the temperature rises, the aluminum balloon should be properly deflated to avoid bursting.