Description Product details. Alcolite Solar Road Stud Model : AL-201 (A) Dimension :133 x 123 x 25 mm Direction : Two way Reflective Body Material : Aluminium & Polycarbonate Reflector & Battery Panel Material : Polycarbonate LED : 3 No.Each Side X 2 (5mm) Color : Red & Amber Available in Inbuilt Shank Storage battery : Ni-MH (1.2v,1200mAH) ; Super Capacitor (2.3v,120F) Light source : Super