Description:10 pieces per pack O-shaped luminous silicone ring for tent stake, night fishing, it will emit fluorescence at night let you know the position of the ground stakes. Made of silicone fluorescent material, durable and elastic, also not easy to break. Glowing at night to protect your safety, avoid tripping, kicking or stubbing your toe at night, can also be used as a marker. Make sure these rings absorb the sunlight before you using them. Generally, it can be illuminated for about 5 hours after being illuminated under the sun for one hour, it can be placed in various places such as the ground nail or the rope or the hanging point of the tent. Specification:Material: Silicone Size: Approx. L: Outer Diameter: 15mm / 0.59inch Inner Diameter: 9mm / 0.35inch Thick 3mm, suitable for nails with a diameter of 9-13mm S: Outer Diameter: 11mm / 0.43inch Inner Diameter: 5mm / 0.19inch Thick 3mm, suitable for nails with a diameter of 5-8mm Package Includes: 10 Pieces Luminous Ring Tent Nails(4 Pack) Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.