This 4" Tall Rubber Curb Ramp can support up to 15 Tons (30,000lbs) allowing vehicles such as cars, trucks, RV's and other heavy equipment to safely transition up and down levels The ribbed surface and reflective yellow caution indicators provides adequate traction which is perfect for indoor and outdoor applications for vehicles that need curb access. You can transport curb ramp in your vehicle so you always have access, or use the integrated mounting holes to permanent mount your ramp at your warehouse or home. With a modular design, you can create you own curb ramp width size, also ending each ramp with a smooth transition end cap.