Black Walnut is engraved and filled with glow in the dark epoxy resin.
Please note this is a handmade item. Glow is brighter when exposed to light. While the glow pigment used is a high quality, I am unable to guarantee the longevity of the glowing aspect itself. Between differences in client care, climate, and other variable factors – I am simply unable to provide an exact time frame. By purchasing this item you are acknowledging this statement. I appreciate your support and understanding.