When the ramp is properly installed, it is very convenient to allow cars and bicycles to move smoothly and traffic. However, if there is a slight difference in height, it will gradually slide or sound every step on it, causing stress.In fact, most of the running ramps are in 3.9 inches (10 cm) or 2.0 inches (5 cm). However, there are many steps that do not fit perfectly at that height. This step ramp is designed to be 2.8 inches (7 cm) to accommodate steps that are defective with other products.This step ramp is also made of hard plastic which is extremely durable and long lasting. In addition, it is recommended that tires such as cars and bicycles are designed to prevent slipping on the slope of the steps.In addition, there is a semicircular indentation on the back of the ramp from right to left, which allows rainwater to flow without stopping. This prevents the slope from moving due to water flow or water pressure.Size: Approx. 19.7 x 10.6 x 2.8 inches (50 x 27 x 7 cm); Number of sets: 2 pieces; Load Capacity: 1 ton; Applicable vehicles: Bicycles, motorcycles, light cars; Color: Black; *Depending on your monitor settings, there may be slight differences in how you see the colors in the product.