Light off -0% + Article code: GDSO-RING, Silicone (1) "Glow in the Dark" O-ring × Please select Size Guide Price$0.49 ? - 0% Discounts - $0.00 $0.49 Add to cart Sorry, but this item is currently sold out. Product Details O-ring made of silicone. Lights up when the lights go out. Take your pick from our range of different colors and diameters. Quick note: the selectable diameters of our o-rings are chosen so that they snugly fit on a plug in the selected size. The actual interior diameter of the product is therefore somewhat smaller than what you select here. Return Policy Still thinking about it? No problem, thanks to our 100% satisfaction guarantee! That's returns for 14 days for unused items in their original packaging - no questions asked! More info here.