With Excellent Ramp System modules, you can quickly,economically and easily assemble all the ramps you need. Excellent Systems can be used all year long and in any type of weather. They can withstand temperatures from -40F to 212 F. The ramps have an anti skid surface and are self draining. The ramps fit any door opening and threshold and can be sized to fit using a knife or saw. Ramps can be re used in other locations or rebuilt to new dimensions.