This is 18 inch foil balloon. You are buying 1 foil balloon.The balloon needs helium to be inflated. It is automatic self sealing.There are 2 sides printing.BALLOON ARRIVES UN INFLATED.WARNING - CHOKING HAZARD : Children under 9 years old can choke or suffocate on un inflated or broken balloons. Adult supervision is required. Keep un inflated balloons from children. Discard broken balloons at once for safety