This is a set of two K&B Dream Designs 30-50 Size Night Tail Blades. K&B Dream Designs night blades are unlike anything seen before. Not only do they handle exceptionally well, they glow in the dark. They are sold as a kit including a pre-wired Ultra-Violet LED. The 30-50 Night Tail Blades come with an Ultra Bright LED cluster. The LEDs keep the blades charged. If you should lose electrical power during a night flight the tail blades will continue to glow brightly to allow you to recover the helicopter safely. This allows night flights without adding extra weight from glow sticks. The helicopter has the same characteristics at night as it does during the day with our K&B Dream Designs tail blades.