To charge the scales so they glow you use sunlight for best results. Will last about 20 to 40 minutes per charge. Please note that all types of carbon fiber will have some small voids. Fit and finish is excellent. 100% solid USA made carbon fiber all the way through.See my other listings for backspacers for this knife. Pics don't do it justice. Please check out my other auctions for other custom scales and backspacer for other knives. I work with G10, Micarta, Ctek, thunderstorm kevlar, and all types of Carbon Fiber. I work on many different knives as well. Thank you for taking the time to look and I look forward to doing business with you. Knives and Bender NOT INCLUDED IN SALE! Pics are only there to show fit and finish. The item "Zero Tolerance ZT0393 Full Glowing Blue Twill Scales (Knife NOT INCLUDED)" is in sale since Saturday, February 1, 2020. This item is in the category "Collectibles\Knives, Swords & Blades\Collectible Folding Knives\Modern Folding Knives\Factory Manufactured". The seller is "2focused4eva" and is located in Fraser, Michigan. This item can be shipped to United States.