Sold as a pair, these Glow In The Dark Glass Spiral Plugs are made from vibrant Pyrex glass, available in sizes from 8G (3mm) to 5/8" (16mm). Each plug features a unique swirl of blue and green colors, making your set truly one-of-a-kind. Hold them up to the light to activate their blue-green glow. Please note, these plugs are not intended for ear stretching.