Improve the road marking line contrary reflection function. When driving at night, the lamp shines on the marking line with glass bead in it, the ray of lamp is reflected back parallely. So the driver can look at the road clearly and drive safely at night. a. Products according to international standard include: JT/T 446-2001,English Bs6008, Korean, KS and American AASHTO etc. b. You can choose different size glass bead between 50um-1180um according to different function.