SAFETY: Carefully selected premium aluminum foil balloons that is toxic-free, odorless, maintains shape without air leakage, regular in size and uniform in color. DECORATION: You can tape the number balloons to the wall or use the ribbon to hang the number balloons on the wall window ceiling or in courtyard. Unleash your creativity, the possibilities are endless! APPLICATION: 40 inch number balloons are perfect for indoor and outdoor use, creating warm and romantic surprise for any age and any birthday themed party. EASY TO ASSEMBLE: No tools neeeded or expertise! All you need to do is blow up the FLAT number balloons by a pump. Or you can fill the balloons with helium so the balloons can float. Reusable birthday sign can be simply store for future use. GUARANTEE: Now preparing the 3D foil letter balloons for your next party! WE GUARANTEE 100% MONEY FREE BACK FOR ANY QUALITY PROBLEM ITEM.