Item No.:SRS0550B Solar LED inpavement road studs / solar led inpavement road markers Size: Dia.50mm, Height: 26mm 1. Single direction or double directions optional 2. Perfect water proof, IP 68 3. Solar Motorway Road Stud With Shank For Highway. NOKIN Bluetooth synchronized solar road stud NK-RS-A6-1 specification: LED Color is Red,Yellow