May 15, 2020 · half circle solar powered road stud cast aluminum raised. Embedded Solar Active Road Studs SRS01200A. Item No.: SRS01200A Embedded Solar active road studs / Embedded Solar Active Road Markers Size: Φ200mm X 25mm 1. High quality Li-on battery, longer life, over 8 years 2. Perfect water proof, IP 68 3.