Size: The outer diameter is about 3.4 cm, the inner diameter is about 2.3 cm
Material: high-quality glue + fluorescent material
Luminous use: It needs to absorb light (light or daylight) for more than 15 minutes before it can shine in the dark.
There is no residue, we can easily use it outdoors for a long time for 2-3 years
Easy to turn the ignition cover switch. No traces or surface damage when removed
Waterproof, sunscreen, non-toxic, environmentally friendly PVC material
One hour after absorbing light, the key ring sticker will light up in the dark