To install these reflective markers, start by thoroughly cleaning the surface where you to place them. This ensures that the rectangle will stick properly and the markers will stay in place for a long time. Each set comes with multiple markers, providing you with enough for multiple applications. These markers are designed to be highly reflective, making them ideal for use in tunnels, on guardrails, or in other areas where enhanced visibility is crucial. The double-sided, double-yellow design ensures that they can be seen from both directions, enhancing safety and visibility. Features -Color:Multi -Material:Acrylic -Size:11.70X4.40X3.00cm/4.60X1.73X1.18in -Robust acrylic build: these rectangular contour markers are made from sturdy acrylic, offering durability and resistance to environmental factors -sturdy reflective performance: the markers provide strong reflective capabilities, making them highly visible in lowlight conditions and enhancing road safety -Effortless installation: designed for easy installation and removal, these markers offer convenience and adaptability for different uses -Wide range of uses: suitable for cars, trucks, motorcycles, and more, these markers are versatile and can be used in various scenarios -Generous quantity: the package contains many markers, providing ample supply to meet various needs and ensuring Package list: 6 x Road Reflectors