These spiky knuckles are cast in clear resin with glow in the dark mica powder. With the lights on the color is a bright orange but when they go down, it is a vibrant yellow so it’s like a summer party no matter what! These are great for multiple uses including self protection, sensation play, impact play, and more. Turn off the lights for some extra fun! 4 inches Item ships in 1-3 business days via USPS. Tracking information will be provided.