Welcome to Tellpet Party Decor World Package Included: 50 pcs spike foil explosion balloons; 1 straw; 1 curling ribbon (5.5 yd). Easy to use: Assembly Instructions is on the back of package, you can use straw or pump inflate it, Foil balloons support air only, and balloons are self sealing, when the inflation is completed, please put the valve to pinch flat Material: Aluminum foil Tip: All balloons are detected by the machines, if there is a holes when inflate, please use the tape to seal it, after party, kindly contact with us, then we will replace or refund for you. Any problem or you need help, Kindly contact with us, we will solve it for you at once. Wish you have a nice day