PROFESSIONAL DESIGN :The rubber wheel stoppers are equipped with high visibility reflective strips.The size of the parking curbs are 18x5x3 inches, which is tall enough for most size vehicles instead of rolling over it without any feeling. It will be easier and safer for you to park in the garage or parking lot with our parking aids. PREMIUM QUALITY : Industrial grade rubber car stops with reinforced design base which is durable and resistant to weather, oil and extreme temperatures. Long life span, less likely to break or crush. EASY INSTALLATION : 2 easy installation methods (Nail free adhesive and bolts) available for you to choose according to different ground surfaces, such as asphalt, gravel, concrete, smooth or uneven surfaces. Both mounting methods are stable and not easy to move during parking.Note: Clean the floor before installing with nail-free adhesive.