IP68 Round Solar Road Studs LED Glass Yellow Flashing road. 5.IP68 waterproof. Our road stud still can work normally after 72 hours dipping in water. 6. Tempered glass shell, load-bearing is over 20tons, can hold a car on the road. 7.Good warranty for quality, one year warranty at least, 2 year warranty can do as client's require! 8.Products