K Lite Amber Aluminium Road Stud Features : Exceeds ASTM D4280 , EN1463-1 of United Kingdom Standard; Polymethyl Methacrylate(PMMA) lens ensure highest reflectivity; Almost indestructible , made from aluminum alloy with compression resistance over 25 tons; Reflect range : 0 - 40 degree; Heat , Water , Oil and Chemical resistant