[ Jumbo Sized ] - We provides big 40 inch giant white helium number balloons. This package contains white numbers 10 foil balloon, and an inflatable straw to make inflation and deflation more convenient [ Exquisite Detail Design ] - Remember, you only need to fill the big number balloons slowly with 90% gas to fully inflate the large balloon and prevent the jumbo helium balloon from bursting due to over-inflation. After filling the giant foil balloon, no need to knot, the air inlet is self-sealing with built-in glue, and it can be completely glued by pinching [ Safe Material ] - Made of safe and non-toxic material, langray 40 inch helium foil number balloons are eco-friendly and durable. In addition, these big number balloons are waterproof and can float in the water after being inflated [ Party Essentials ] - These 40 inch helium foil number balloons can perfectly decorate boy or girl 10th birthday party or other anniversary events, and is also a great photo prop for kids