cast aluminum solar road stud airport with spike-Nokin Road Studs. Solar Road Studs,China Model Solar Road Stud. reflective road stud: Material: Cast Aluminum: LED Color: Red Blue Yellow White Green: LED: 3pcs/side 10mm super brightness LED: Solar panel: 2.5V/180MAH Monocrystalline silicon: Storge device: 2pcs NI-MH 1.2V/600MAH: Visibility: 1000m: load bearing: over 30tons: unit weight: 0.7kg