This is the original holographic blade decal for your RC heli blades. When flying you will be amazed at them and be the envy of the field. Simply stick them to your blades and when spun up they produce an illusion of 8-12 images of themselves in the disk. No heat required like some! Just wipe down your blade with some Alcohol based cleaner, dry and stick on. All sizes available from 450 size Heli upto the 90 sizw machine.