Ecto Gray Wavelength Skull Mallet SpecialSpecial variation version sent to 12 random buyers of the Ecto Gray Skull Mallet Cover. Not available for purchase. Radio waves, television waves, and microwaves only differ from each other in wavelength. A wavelength is defined as the distance between one wave crest to the next we just thought it was the period of time between scoring this cover and getting sniped. *Limit 1 Per Customer Designed and Manufactured in the USA Industrial Magnetic Closure