Hot Sale Solar Road Stud For Motorway Company--Solar Road NOKIN NK-RS-A6-1 Solar road stud is hot sale in the market.Body material is Aluminum (GB-ADC12)+PC (Japan Brand). Power supply of this solar road stud is USA Brand High Efficient Solar Panel 2.5/150MA for NI-MH battery 5V/60MA for Lithum battery 3v/120MA for super capacitor.