Jun 12, 2022 · Solar Road Stud More Colors available: Red, Green, Blue, White, Whom White, Yellow . Solar Road Stud Installation View: Embedded Solar Road Stud. Solar Road Stud Installation Instructions: Core Drilling a hole Size: Dia.100MM X 30 – 40MM(Depth) Clean and Dry the hole; Fill in glue to 1/3-1/2 according to the road situation