Non-slip ridged rubber surface. Soft on Paws Superior traction wet or dry; Opens and closes in seconds 36" L x 17" W x 5.75" H folded 70" L x 17" W x 2.5" H unfolded Weighs only 18.5 pounds Holds up to 500 pounds Safely holds any weight dog Reduces arthritis & Dysplasia pain Portable (ergonomic handles on both sides) Floats in water, will not sink No materials used that can trap odors Universal non-slip grip fits all vehicles and edges Will not rust or corrode, washes with soap & water The PetStep II Folding Dog Ramp;helps your pet overcome;stairs, vehicles, and furniture. To use, simply unfold the ramp and prop one end against a truck bed, vet table, or top step. Animals can walk up or down at a gentle incline, instead of struggling, jumping, or being lifted. With its sturdy structure and rubberized surface, this dog;ramp helps reduce arthritis and dysplasia pain, lowers the chances of injury, and cuts down on back strain. The nonslip grip is compatible with virtually all edges. In addition to its primary function, the PetSTEP Dog Ramp has any number of secondary uses. With its Advanced composite plastic construction holds up to 500 pound;capacity, it's sturdy enough for humans. We stood on the PetStep II dog ramp (one of us weighs 190 pounds), bounced up and down and saw very little flex. Designed to be rust-free and to float, the;pet ramp;measures 70 by 18 inches and comes assembled. A latching mechanism keeps it closed between uses. The PetStep II Folding Dog Ramp is easy to open and close plus it's lightweight - weighs only 18.5 pounds.; The new non-slip surface is great going up and down. No slipping and sliding. The rubberized ribbed surface grabs dirt so less inside the vehicle. Soap and water for easy clean up. The PetStep II Dog Ramp accommodates a vehicle height of up to 37 inches. We like it..