18-inch high-end party balloons, in 10 rainbow colors, 2pcs per color.Note:If you want heart balloos to float, you have to add helium. It can float for 18-24 hours. It is recommended to use on the same day. Assorted color balloons can be used to decorate birthday parties, rainbow parties, unicorn parties, showers, bridal showers, party balloons. Ideal party decoration products, made of high quality foil, environmentally friendly.