1,material:compound foil 2,size:15.5cm ,thick:0.03-0.04mm 3,the MOQ is 10,000pcs 4, CE certification The so-called self-filled balloons, just as the name suggests, is automatically inflating the balloon. Because it is easy to use, and does not need other inflatable equipment which can automatically generate the gas, it is widely used by many customers. PrincipleThe reason why self-filled balloon ...