... very light. LED Balloon can floating in the sky after Helium filling1)high-class material and lovely style 2))Balloons weight ... :5.5g: 3)Suitable for helium,air4)A fantastic product for all occassions5)Balloons Color: Black ... , Yellow, Brown, White, Red, Pink, Purple etc ...6)Suitable for helium or air filling7)Use 3 AG10 button cell batteries 8 ...