Application: For center line of two-lane highway, for dividing lines of four-lane highway, for vibration surface. Materials: Plane aluminum alloy housing/pc (polycarbonate) reflector lens. Colors of lens: White & red/yellow & yellow Features: 1. Reflector lens are made of impact and pressure resistance pc material. 2. Formed by die casting with aluminum alloy. The thread bolt is mounted into the road surface. 3. Extended service life and higher loading due to die casting. 4. Safety features designed in the product. If the marker is impacted such that the rivets are dislodged from the road surface, the rivet heads will not turn out to puncture tires. 5. Lens of high reflective gradient marker perfect for mountainous areas especially on foggy and rainy days which are always a factor in mountain driving. 6. Reflecting intensity is accord with cns standard.