Durable material: Made of hard-wearing PVC material. Can be cut to fit the available space and is ideal for interior and exterior doors. There are five colours to choose from, if you are not sure if the robot can detect black, please buy a grey ramp. Anti-slip: The wave-shaped design improves friction and traction without slipping, avoiding falls and tripping. This threshold ramp allows a smooth transition for doors. Nail-free installation: Because the bike ramp is lightweight, it is easy to move. wheelchair ramp must be attached with nail-free adhesive. Suitable for tiles, wooden floors, marble and other smooth surfaces. Adhesive is not included in the package. Motorbike ramp: Can carry a load of up to 500 kg, suitable for people with mobility scooters and wheelchairs. A great tool to eliminate the inconvenience of the threshold. Easy to carry: It takes up no space to carry, is lightweight and easy to store. Please measure first so you can order the correct height.