16 inch gradient rainbow letter number balloons unicorn party foil balloon baby shower 1 birthday party decorations kids numbers air ball (16 inch rainbow r) reians note: the number can fly with helium materials: aluminum foil letters: 1pc/pack color: rainbow optional size : 16inch/pcs package : 11 letter/number(16inch) 2plastic straw x 1pc (5.7 inch) tip : all aluminum foil balloons are detected by the machines , if air leak occurs while inflating, please press the inflatable hole or use tape to assist the automatic sealing of the balloon. any problem or you need help, kindly contact with us , we will solve it for you at once.