This an optional K&B Dream Designs Extreme Edition Tail Blade Set, and is intended for use with the Blade 130 X helicopter. K&B Dream Designs Helicopter tail blades are created using a complex combination of materials which provide the perfect mix of strength and flexibility. The blades have a very large surface area, yet weigh very little. The colorant is made to strict specifications and is mixed as the blade is created. The color completely permeates the blade, and is not painted or applied. All similarly sized blades are the same weight, allowing the user to customize their tail rotor colors as desired.