The PawStep 50524 61" Portable Folding Pet Ramp requires no assembly. Simply remove from packaging, unfold, and it is ready to use. The ramp is constructed from durable molded polypropylene (PP) plastic, making it rust- and corrosion-resistant, lightweight, and easy to clean. The ribbed textured surface and raised side rails are designed to help guide pets while walking up or down the ramp. Because the ramp surface is molded plastic, traction may vary depending on vehicle height, ramp angle, and individual pet comfort. For pets that require additional grip, a custom-fit anti-slip carpet accessory is available through the variation options. Customers may also select a version of the ramp that comes with the carpet pre-installed for enhanced traction. The ramp supports pets up to 165 lbs. Folded dimensions are 31.5" x 15.5" x 7.5", and unfolded dimensions are 61" x 15.5" x 6".