Waterproof, Energy-Saving And Eco-Friendly Dhruv Solar Road Stud Made Out Of Solid Aluminium-Alloy Shell Powered By Solar Cells And Panels. Ideal Signal Product For Highways, Parking Lots, Roads And Similar Isolated Or Stand-Alone Traffic. place Of Manufacturing. China. different Size. 110x110x25 Mm, 125x125x20 Mm, 125x125x25 Mm, 100x100x21 Mm.