Sea Dog Portable Boarding Ladders 4 and 5 Step Available. These portable emergency boarding ladder is made of molded-in, high-visibility orange polycarbonate with nylon rope supporting the frame. It secures quickly to cleats, railings, stanchions and halyards and will support up to 300 pounds. Part Number A B C D Steps 582501-1 6 11-34 3 2 2 4 5 582502-1 4-58 11-34 2 5 2 4 4 California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Boat Doc