Product details: 

SIZE:  2 ft;  3 ft;  4 ft;  5 ft ;  6 ft.

29" inside width / 29.25" outside width

Purpose: 

Aluminum ramps are Ideal for temporary or semi-permanent use,indoors or outdoors. Accommodates scooters, walkers, wheelchairs, canes & crutches.Attaching lip fits on almost any flat surface.Ramps are bolted, not riveted for a more secure driving surface.The perforated slots keep water and debris from collecting on driving surface. it will not rust and easy to use carry handle and folds in half for storage. Aluminum, non-skid surface,. Pre-drilled holes for easy installation. Weight capacity: 600 lbs