... Parameters: 1), Dimensions: 100 x 100 x 20mm 2), Plastic material, good reflexible 3), Good gompressing resistance, strong reflection 4), ... night. 2). Anti-corruption: Water-resistant, oil -resistant, chemical material resistant. 3). Bright color and reasonable design, and diamond reflection ... road's sides, middle, urgent curve or highway entrance. plastic road stud with two side reflective material