Made of high quality aluminum foil balloons and auto-seal. You will receive 5 pcs balloons in size 38″ as the picture,one blow pipe and one serial line. Please inflate the gas slowly until 90% filled and keep away from fire, because of the thermal expansion(the inflate pump and string are NOT INCLUDED). Balloons Kit is suitable for New Years, Celebrations, Graduations,birthday,baby shower,Christmas, Weddings etc..