Firefly Light Up Quad Roller Skate Wheels - Flashy Light Up Wheels - Your Choice of 4 or 8 Wheels in Sizes 58mm o 62mm - Roller Derby Fireflys TECHNO SHOWTIME model includes ABEC-3 bearings. Light Up Skate Wheels with no batteries required! They light up as they spin with LED Colors! They come in your choice of 58mm or 62mm and can be used indoors or outdoors! Low friction and free spinning for use as a set or as an addition to your other wheels. Set of 4 Skate Wheels so You Can Use them on the 4 Wheels Around the Outside of your Skates or Select a Set of 8 Wheels and have All Your Wheels Light Up !! - Select Your Favorite Size from the Menu List !!