These two model solar road studs with 6 screws are available in two sizes, one is 150mm in diameter, the other is 14NOKINm in diameter, both use F8 super bright lamp beads, durable aluminum alloy base, sturdy PC shell, The waterproof level is Solar LED Road Stud (Flush Type) (id:9611870) Product details Solar LED Road Stud (Flush Type) Dimension.