3m raised pavement markers series 290 honeycomb molded are tough, Impact, Resistant bodies and abrasion, Resistant lenses ensure long, Lasting endurance and efficiency durable, Lightweight thermoplastic raised pavement markers that provide highly effective, Long, Life visibility, Particularly at night and in wet weather. Markers is applicable to pavement and masonry road surfaces. The markers are impact resistant and increase awareness with an added rumble effect. 3m raised pavement markers are made with 3m diamond grade prismatic optics for maximum reflectivity. Twin shanks that prevent displacement/disorientation post installation impact and tough against scratches molded shanks for longer durability pressure sensitive adhesive for ease in application wet and dry retro, Reflective