Material - High Quality Plastic. || Colour - Yellow. Road studs provide effective night guidance during night hours and in adverse weather conditions. The studs are easily visible and can be heard and felt due to the rumble when a vehicle crosses over them. 3M road studs Designed for application on asphalt and concrete road surfaces, these road studs provide highly effective, long-life visibility, particularly at night and in wet weather. Stud can paste with apoxy on road or can be mounted with nail also.