Features: *Silicone material, strong flexibility, good elasticity, anti-aging, small and durable, wear-resistant and not easy to break. * Luminous protection, safe and reliable. It has super recognition, can reflect light, and can automatically store luminescence. * Lightweight and portable, strong compatibility. The diameter of ground nails can be used around 9MM, which is highly compatible and practical. *These fluorescent o-rings absorb sunlight during the day and glowing in the dark at night, so they are easy to notice and keep people from tripping. *Easy to use, just place the fluorescent rings on top of the tent stakes. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: Silicone Size: As shown Package List: 100pcs x Outdoor Nail Fluorescent Rings