The PetStep Dog Ramp has a ribbed non-slip surface with unique rubberized coating which is safe for all pets. Safely holds all breeds. Helps to reduce arthritis and dyslpasia pain in your dog. Floats in water and will not sink. Easily portable with balanced ergonomic handles on both sides. Univeral non-slip grip fits all vehicles and types of edges. Will not rust or corrode, washes clean with soap and water. Lightweight at only 11 lbs. Measures 39" L x 17" W x 1.75" H The raised edges add safety for loading and unloading. Holds up to 500 lbs. One year conditional warranty. Great for indoors for beds, or outdoors for RV's.