Amscan 18 Inch Leaf Design 40th Anniversary Circular Foil Balloon Mixed, , Circular 18 inch foil balloon with leaf design and Happy 40th Anniversary text. Supplied deflated for ease of postage. Can be filled with helium or air. Once inflated avoid exposure to extreme temperatures. A 1m length of colored ribbon or a coil of white ribbon can be attached to the neck of each balloon - sold separately.