Mad Science Party Balloons - Helium Periodic Table Element (16 pcs， Deluxe 2-Sided) by Nerdy Words (Assorted)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>DELUXE: Printed two-sided， helium periodic table element design.</li><li>Set of 16 balloons (assorted colors: yellow， lime， orange， aqua， blue， red， pink， purple).</li><li>12" (30 cm) latex balloons， helium quality. Approximate float time: helium 8-14 hours， air 5-7 days.</li><li>100% biodegradable.</li><li>Perfect for birthdays， graduations and science lab gatherings.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51Rlhe5T7uL.jpg" noproxy>