This Sunset Flare, 59mm four pack wheel set, is cast in high quality clear 78a Poly-Urethane (PU) for that super smooth, soft cruiser ride you are used to. Our Flare LED Wheels offer the brightest LEDs in the industry and have the capacity to glow for a staggering 100,000 hours. Four ultra-bright LEDs illuminate each wheel's crystal clear PU, bringing your Sunset skateboard to life in the day and especially in the night. Batteries.. NOT. Our LED wheels self power off the spinning motion of the wheel therefore no batteries are ever required. Each wheel is embossed with our original Sunset Flare logo.