Non-skid vinyl surface keeps heavy loads in placeHeavy-duty steel trucks with 4" rubber casters; 2 stationary and 2 swivel. Folding handle for easy storage in tight areas. Wrap- around vinyl bumper protects doors and furniture from damage. Available in light grey baked enamel finish.Overall dimensions:SF4072: 29L x 19"WSF4063: 36L x 24"W