KANDI CORP-Crystal Style HotFix Embellishments: Blue Mix. This set includes 3.5mm and 2.5mm hotfix Swarovski jewels in four shades of Blue: royal; ice; turquoise and light violet. To attach these gorgeous gems to fabric; paper; wood; and even glass is any hotfix tool (not included) or iron (not included) because the adhesive is already on the back. Imported.