The photo on the left is before glow-in-the-dark treatment, and the photo on the right is after. It glows green in the dark when exposed to ultraviolet light. Please note that this is not a set of two. The item is one set. Flashabou Tinsel Flasher Fly Material Lame Twist Glow Glow-in-the-dark Luminous Luminous White Mebaru Mebaring Fly Fishing Night Fishing Approximately 31cm in length Flashabou Tinsel Flasher Fly Material Lame Twist For making your own panic sabiki rigs, assist hooks, and custom lure hooks. How about using it as a material for flies and tenkara kebari? Keimura (UV reactive) Ultraviolet light emission Fluorescent substance UV emission Phosphor Fluorescent emission Photoluminescence Luminous fiber Black light UV light Fishing Fishing Homemade Lure Artificial bait Metal jig Custom Jig hook Swimming hook Assist hook