I did not know and I ordered her bright balloons after reading several positive reviews and actually I really have not been disappointed. The order arrived in time and this is the first time positive pr me. WHEN IT then had to inflate is simple pulling on the tab and the balloon is inflated and that's the trick. Small as the greatest super loved it makes in a room that's really original. The only problem we had was with two balloons were drilled sur15 but hey it's okay.