Ladder Roller designed to snap horizontally or vertically. Roller works on 6 Ft. and above fiberglass a-frame/extension ladder. Roller can be also mounted permanently with screws or zip tie. Carrier can be used to carry ladders, paint cans and more. Meets OSHA Ladder Safety Standards. Width: 3.75 In. Height: 6 In. Material: Plastic Color: Black For Use With: Ladder, Paint Can, Drywall, Plywood